I had my sc400 in the shop over a year,and they gave up. Car starts but has no power like it's a bad catalytic converter. They said car wouldn't give a code and tried all they could think of. I'm going to storage next weekend to give this a shot. Ty brother! You've given me hope. I love that car!
That ecu also shutdowns the power to the fuel pump when the engine is not running. If in a accident and a fuel line is broken the pump will still pump fuel causing a spill and a potential fire hazard. I have mines bypassed but im going to go a different route by finding the other wire in the plug that only sends a signal while the engine is running and adding a relay.
Did you ever figure this out? My LS400 pump ECU I think is having issues as my car shut off twice, and if this makes this mod safer I'd like to do this also.
The relay provides power when the key is on. The FPCU distributes that power to the fuel pump under instruction from the ECU. The ECU waits to see the start signal and run the pump while cranking. If the ECU sees the engine is running, it continues to instruct the FPCU to run then pump in one of the two modes based on fuel demand. If the ECU sees the engine has stopped, like for example if there is a crash or a severed fuel line, it instructs the FPCU to stop the pump. This is an important safety feature.
Im not sure exactly what conditions the ECU needs to see to call for high or low speed mode, but its conceivable that if the low speed circuit works but the high speed circuit does not, the engine would cut out when there is high fuel demand. This would in turn reduce the demand for fuel and the ecu would call for low speed mode again, restoring fuel flow. You can troubleshoot this theory by connecting your test light to the FP terminal in the check connector port on your upper intake manifold. If this is the problem, you will see the light cut out under high load when the ecu calls for high speed and come back on again when it reverts to low speed.
What’s good brother I like I like you gave lots of game to help people step by step and this is my first time watching I love to learn more I have a few problems on mines if u have some time I really need your help I really appreciate it
Not sure how you all feel about being burned alive, but it's not on my bucket list. The FPCU is responsible for TURNING OFF THE FUEL PUMP IN THE EVENT OF AN ACCIDENT. Without it, the contents of your fuel tank could be pumped out onto the road after a crash. There are aftermarket devices which monitor the ignition signal and can be used in conjunction with this mod, or at very least, a shock sensitive fuel cutoff switch from a Ford ranger should be installed in the circuit. The FPCU also keeps the fuel pump from turning on until the key hits the start position. With this mod, your fuel pump will run as long as your key is in the on position, including if your engine stalls, or (fatally for the fuel pump) if you run out of fuel.
many thanks for this Video I do the same for the gs 300 . but was problem with that which is , high pressure fuel result pump get hot and that's will short it life . many thanks Salem
I was just stuck in a parking lot mid day Florida and watched this video, tried it with a paper clip because it’s the best option I had and my car started. Did it work or was it perfect timing for the grimlin to hide? I’m not sure but thanks cause I’m going to say it was the paper clip along with the video.
My 1995 Lexus sc400 shut off on me while driving.. I did the ecu bypass and it still didn’t start. I never really had signs of a bad fuel pump but the most weird thing I would notice is when I take off my gas cap , it would make a sound of compressed air finally coming out like if my gas tank was thirsty for air lol. I’m about to change the fuel pump but I will be sad if it still doesn’t turn on lol. 155k on the dash
Brooo I have the same issue 😂 95 sc400 too I’m changing the fuel filter but it’s so rusted so I’m not sure if nothing works imma go take it to professional mechanic and diagnose it
As far air coming out of gas tank is due to charcoal canister is blocked . I have sc400 1993 happed same with me. Bypassed charcoal canister with cheap amazon filter worked for few days ( air stopped coming out of tank) but that filter failed. Now I’m back on factory charcoal canister which is 30 years old and definitely clogged.
I did not see in your video how to jump the ECU completely you mentioned the red black and green wire but I could not see which wires you jumped together could you please explain which wires I am supposed to connect together I have the same problem
Hello how are you sorry about that you cut the black and red and the green off the plug then your going to crimp the two wires together with a wire connector. and thats it
I have a sc 400 and trying to get to to start I think this is the problem it's just cranks just doesn't fire but I don't ever hear the fuel pump kick on
So i did this same thing but jumped the wires by cutting them and soldered them together and then plugged the connector back into the fuel pump ecu. My main ecu got fried, could this be because I plugged the connector back in instead of leaving it out like in this video? Thank you for any help, this car is making me pull my hair out
@@GazaPerformanceGarageGPG I did . Problem is when the security light is blinking still when I insert the key, it won’t start because that disables the fuel pump . Will only crank but no start . I’ll just have to try this mod ! Thanks 🙏
What is the purpose of the emu if you can just bypass the plug? My Sc 400 ‘95 was starting fine - after I checked voltage on the engine bay Fuse box it will now not start: just cranks .... so would this be the Eli relay there. Thanks, H
That's a secondary function. The primary function is ensure the pump only runs if the engine is running... more specifically, in the event of a crash, it turns the pump off to prevent fuel being pumped onto the road - this is an important safety mechanism.
Is this the same on the LS400? I have a 93 LS400 with 145k miles, and it's shut off in traffic twice. My LS400 has shut off on me twice now in really hot weather, I do plan to replace the cars ECU capacitors because I am starting to lose lighting in my RPM needle, and sometimes my RPM/Speedo do not work until I drive down the road for a few minutes. But I wonder aside from leaky capacitors in my cars ECU if this fuel pump ECU could be the cause for my car shutting off twice. What gauge wire did you use, or recommend for this also btw?
Take a look at the video as well 8:00, connect the red and black wire to the green wire, cut the two wires from the clip and join them with a connector
So what I didn't ask you is if I bypass ecu is the fuel going to be regulated any or is it just going to be dumping large amounts & not ever stopping untill I cut the car off. This is my only ride.
@@shaunadapettway3890they only put the ecu to make the pump last an extra year longer and yes your fuel pressure is now full send for faster response more hp out put and I know your going to ask me why should I take this out if its making the fuel pump last longer" its up to you Shaundra. they dont make these any more and if you find one its going to cost you more than what a fuel pump cost and so on.... if you find one in the junk yard this is the reason why the car is in the junk yard and they could not figure why the car is not starting. so dont worry change it out and buy a walbro 255LPH pump for just 60 bucks for more Hp
@@GazaPerformanceGarageGPG Thanks for response. I hope I can do bypass and wait on that specific fuel pump because I do not have the funds for much extra.
I have ls400 93model I dont no 12v on fuel pump relay And no spark on plugs And no pluse on injector to Help will be highly apprectated😢 It cranks but not start
when you bypass the ECU do do get like air leak coming from the injector when you put the key in the start position bc im getting air sound or its like fuel near the left side injector when engine is off and key in accessory position
This is because this mod makes your fuel pump run constantly as long as the key is in the on position... the FPCU prevented that previously. The sound you are hearing is likely fuel rushing through your fuel rails. The 1UZ uses a return fuel pressure regulator. This means that the pump pushes the fuel at, let's say upto 120 psi. The fuel flows into the left fuel rail at the fuel pressure damper, through to the fuel pressure regulator on the right rail. The fuel pressure regulator then bleeds off excess fuel pressure (over about 68 psi, if I recall correctly) through a return line back to the fuel tank. This means that fuel is constantly flowing through the fuel rails so long as the pump is running. This is only really a problem if there is a leak in the fuel system, like if you have a leaky injector or if you are in an accident.
My 1992 Lexus with 98k miles has a problem of not starting just cranking. I don’t hear the fuel pump kick on when I put the car in on position. Could this be the fuel pump itself or the fuel pump ECU?
First pull the gas tank lid and listen through the filler hole if there is noise or ir pushing out the means the pump is not getting power, then you do a fuel pump ecu bypass,make sure the fuel in the car is good because fuel can lose its luster and turn to oil only and will not start
@@GazaPerformanceGarageGPG I replaced the ecu fuel pump and it started right up. Then I want to say about 2 weeks later I let it sit for about 6 days and went to start it and boom! Won’t start again ! Can I use a paper clip to bypass the ecu I don’t have wire
@@GazaPerformanceGarageGPG okay so here is something else you may be able to help. After I unplugged the fuel pump ecu for about 5 Seconds then plug back in. The car franks and wants to die. I then crank again and it starts up no problem then will die again in a couple hours... thanks for the help !
Mine just died, For mine the car stalled (very softly). After driving and turning it off, I would try to restart it and it would just crank. Also morning startups were longer then usual. Then lastly one morning it would crank, start then die after 10 secs. I jumped two pins at the engine dio port and it started and ran. That told me my ecu was bad
@@skydyleyw0037 It is , got to test it out going to Naha today. Before I was getting a Code 34 DTC also, I was able to redline 1st to 3rd with no issues . Before it would take some time to start , now it starts within 2 seconds I would say. But I also ordered a AEM 320 to replace the stock pump .
I have a video on something like that, I think it's the 2nd or 3rd video I made. But if you don't scan the car it could be a guess. There is also a video on how to scan your car if you don't have a ODBII port
@@GazaPerformanceGarageGPG check this out i just scanned the car with a jumper wire because obd1 and check engine just keeps flashing fast and doesn't stop lol smh wow it even let me diagnose codes ..
I did those trick but I just used a butt connector for the green and red wire and it ended up not working , and before it would start for a second and shit off , now it just cranks no start, anybody know why , thanks
of course mine wont start with this trick it just spins lol, maybe not getting good contact, ill probably just end up cutting them and splicing them directly together with a fuse in the middle
@@GazaPerformanceGarageGPG i recently got this 94 SC400 and im unaware if its had a fuel pump change, its at about 250k miles though so i suspect it might've been changed at one point
@@Cleavatr0n i was able to get it to work the way he did it, i just had to make the jumper shorter and use a thicker wire to get good contact, but ill deffinetly be permanently wiring it soon. i also just found out my SC400 is missfiring because the ECU needs rebuilt, it has some blown caps
@@spartanreaper911 I recently went through the same deal with the ECU. Kept throwing my car into limp mode and fucking everything up. I sent it to Tanin, got it rebuilt, and everything is good as new. I dunno what Toyota was thinking when they decided to make these things lol...
Mr gaza i just got a 92 sc400 today… i got it from a seller in new york city and i drove it almost 2 hours to Long Island with no problem.. but when i stopped by for a fast food and turned off the engine it wont start anymore.. just endless cranking! i left the car and will comeback tomorrow.. any suggestions ❤️🙏 thanks
@@GazaPerformanceGarageGPG i did the bypass already sir’ thanks🙏 but sometimes the fuel pump still won’t kick in? I have to repeat several time and sometimes play around with the ignition until the fuel pump kicks in again and then it will start? Could it be the fuel pump dying out this time? When car runs its smooth… to be honest i like it better than my 97 SC300 manual✌️
@@rp17rionda if it has the original pump from 1992 yes change it, put the walbro 255PLH pump in also unplug the MAF and start it if that could be a problem. my friend what this boils down to is you have to do a full service on the car now. fuel pump, fuel filter, cap and rotor, spark plug and wires
every almost every SC/LS enthusiast does this mod to save time because when it does go bad its hard to diagnose, im doing this for mine as well since mine went bad.
fuel pump ecu went bad, they cost 400buck new and the ones you find in the junk yard no good. so you bypass and get 100% fuel pressure all time thus creating a faster throttle response. and more hp out put
@@GazaPerformanceGarageGPG I m a bit confused. Javier said fuel pump ecu relay. Did he mean fuel pump ecu? Is there a fuel pump relay? Or is there just a EFI relay?
@@GazaPerformanceGarageGPG I drained my tank completely. Will the pump still start on an empty tank? I have 12v at the plug going into the sender unit.
I had my sc400 in the shop over a year,and they gave up. Car starts but has no power like it's a bad catalytic converter. They said car wouldn't give a code and tried all they could think of. I'm going to storage next weekend to give this a shot. Ty brother! You've given me hope. I love that car!
The only two times my SC left me stranded, it was this ECU. The bypass works great.
That left me stranded as well lol
That ecu also shutdowns the power to the fuel pump when the engine is not running. If in a accident and a fuel line is broken the pump will still pump fuel causing a spill and a potential fire hazard.
I have mines bypassed but im going to go a different route by finding the other wire in the plug that only sends a signal while the engine is running and adding a relay.
The fuel pump ecu only controls the speed of the pump. there is a relay that sends power to the fuel pump. good question though.
Can anyone tell me if a faulty fuel pump ecu can cause sluggish acceleration or dead spots in rpm range?
Did you ever figure this out? My LS400 pump ECU I think is having issues as my car shut off twice, and if this makes this mod safer I'd like to do this also.
The relay provides power when the key is on. The FPCU distributes that power to the fuel pump under instruction from the ECU. The ECU waits to see the start signal and run the pump while cranking. If the ECU sees the engine is running, it continues to instruct the FPCU to run then pump in one of the two modes based on fuel demand. If the ECU sees the engine has stopped, like for example if there is a crash or a severed fuel line, it instructs the FPCU to stop the pump. This is an important safety feature.
Im not sure exactly what conditions the ECU needs to see to call for high or low speed mode, but its conceivable that if the low speed circuit works but the high speed circuit does not, the engine would cut out when there is high fuel demand. This would in turn reduce the demand for fuel and the ecu would call for low speed mode again, restoring fuel flow. You can troubleshoot this theory by connecting your test light to the FP terminal in the check connector port on your upper intake manifold. If this is the problem, you will see the light cut out under high load when the ecu calls for high speed and come back on again when it reverts to low speed.
Thank you, very useful information!
Glad it was helpful!
Man I was ready to burn my car until you saved me. Thanks so much!
Lol
Tell your friends and family joint the Gaza Performance Garage, it helps out alot with more content
I am happy to help you on this, the dealer don't want any one knowing this
Yes me too. I told a few people I'm just going to fucking torch it
She sure is pretty brother! Thanks for the video. I'm working on this next and this helps a ton!
Anything to make it happen for my peeps thank you for your support 🙏 tell your friends to sub and like 👍
I came here from your listing on FB!
Thank you 100%
What’s good brother I like I like you gave lots of game to help people step by step and this is my first time watching I love to learn more I have a few problems on mines if u have some time I really need your help I really appreciate it
im sorry for the late response im catching up to my Q&A
Not sure how you all feel about being burned alive, but it's not on my bucket list. The FPCU is responsible for TURNING OFF THE FUEL PUMP IN THE EVENT OF AN ACCIDENT. Without it, the contents of your fuel tank could be pumped out onto the road after a crash. There are aftermarket devices which monitor the ignition signal and can be used in conjunction with this mod, or at very least, a shock sensitive fuel cutoff switch from a Ford ranger should be installed in the circuit. The FPCU also keeps the fuel pump from turning on until the key hits the start position. With this mod, your fuel pump will run as long as your key is in the on position, including if your engine stalls, or (fatally for the fuel pump) if you run out of fuel.
That's ok , get a used one for $300 for me mine is working just fine after 5 years
many thanks for this Video I do the same for the gs 300 . but was problem with that which is , high pressure fuel result pump get hot and that's will short it life .
many thanks
Salem
I was just stuck in a parking lot mid day Florida and watched this video, tried it with a paper clip because it’s the best option I had and my car started. Did it work or was it perfect timing for the grimlin to hide? I’m not sure but thanks cause I’m going to say it was the paper clip along with the video.
I'm happy to help
Eres un chingon 😂❤🎉😅
😆
Great video
Thank you
My 1995 Lexus sc400 shut off on me while driving.. I did the ecu bypass and it still didn’t start. I never really had signs of a bad fuel pump but the most weird thing I would notice is when I take off my gas cap , it would make a sound of compressed air finally coming out like if my gas tank was thirsty for air lol. I’m about to change the fuel pump but I will be sad if it still doesn’t turn on lol. 155k on the dash
I have the same exact issue ! Did you ever solve this issue ?
Brooo I have the same issue 😂 95 sc400 too I’m changing the fuel filter but it’s so rusted so I’m not sure if nothing works imma go take it to professional mechanic and diagnose it
U guys figure it out same train here
As far air coming out of gas tank is due to charcoal canister is blocked . I have sc400 1993 happed same with me. Bypassed charcoal canister with cheap amazon filter worked for few days ( air stopped coming out of tank) but that filter failed. Now I’m back on factory charcoal canister which is 30 years old and definitely clogged.
😂fuel has pressure that’s all it is happens to all cars
Thanks for sharing. ☑️
Very helpful, thanks man!
What diffuser are you rocking btw? Looks great
I did not see in your video how to jump the ECU completely you mentioned the red black and green wire but I could not see which wires you jumped together could you please explain which wires I am supposed to connect together I have the same problem
Hello how are you sorry about that you cut the black and red and the green off the plug then your going to crimp the two wires together with a wire connector. and thats it
I have a sc 400 and trying to get to to start I think this is the problem it's just cranks just doesn't fire but I don't ever hear the fuel pump kick on
Same trying to figure it out rn
Same bro u ever figure it out?
@@laflame2024 hell no still fighting it I'm at the point I'm about to pull everything and redo it
@@tykeatoncollins3054same bro sent the ecu in and everything fuckin regret buying this car 😂😂
I assume I did the wrong ones cause the wire burned up when I tried this
So i did this same thing but jumped the wires by cutting them and soldered them together and then plugged the connector back into the fuel pump ecu. My main ecu got fried, could this be because I plugged the connector back in instead of leaving it out like in this video? Thank you for any help, this car is making me pull my hair out
Yes boss
Did you're sc sound cammed out? Amd that ecu bypass fixed it? I've been chasing an issue just like a cold start video you posted
Yes it fixed the problem thank goodness
Wow so.nice
Thank You I'm honest and true to my work.
I tried to 12v mod my fuel pump ecu but my diag port is missing the fp pin.😢
Is the fuel ecu location different to a mk3 supra? All I know is where the fuel relay and resistor is at
Right on dude
Will this fix the problem on my gs300 not starting when the security light is blinking ?
Check your crank or cam sensor it can do this
@@GazaPerformanceGarageGPG I did . Problem is when the security light is blinking still when I insert the key, it won’t start because that disables the fuel pump . Will only crank but no start . I’ll just have to try this mod ! Thanks 🙏
What is the purpose of the emu if you can just bypass the plug? My Sc 400 ‘95 was starting fine - after I checked voltage on the engine bay
Fuse box it will now not start: just cranks .... so would this be the Eli relay there.
Thanks, H
The purpose of the ECU is to allow high voltage or low voltage to the fuel pump so we can prolong the life of the fuel pump it goes bad
That's a secondary function. The primary function is ensure the pump only runs if the engine is running... more specifically, in the event of a crash, it turns the pump off to prevent fuel being pumped onto the road - this is an important safety mechanism.
Does this give the car any performance gains?
Oooh yeah now you you get full send on your fuel supply
Where did you find the front end strut tower brace?
Is this the same on the LS400? I have a 93 LS400 with 145k miles, and it's shut off in traffic twice.
My LS400 has shut off on me twice now in really hot weather, I do plan to replace the cars ECU capacitors because I am starting to lose lighting in my RPM needle, and sometimes my RPM/Speedo do not work until I drive down the road for a few minutes.
But I wonder aside from leaky capacitors in my cars ECU if this fuel pump ECU could be the cause for my car shutting off twice. What gauge wire did you use, or recommend for this also btw?
It has one. In the trunk on the right side next to the tail lights
So Gaza. I respect you but I need more specific like do I connect the red & green or red,green, black etc
there are 2 thick wires use a wire connector to join these 2 thick wires yes they are different in color. join them together
Take a look at the video as well 8:00, connect the red and black wire to the green wire, cut the two wires from the clip and join them with a connector
So what I didn't ask you is if I bypass ecu is the fuel going to be regulated any or is it just going to be dumping large amounts & not ever stopping untill I cut the car off. This is my only ride.
@@shaunadapettway3890they only put the ecu to make the pump last an extra year longer and yes your fuel pressure is now full send for faster response more hp out put and I know your going to ask me why should I take this out if its making the fuel pump last longer" its up to you Shaundra. they dont make these any more and if you find one its going to cost you more than what a fuel pump cost and so on.... if you find one in the junk yard this is the reason why the car is in the junk yard and they could not figure why the car is not starting. so dont worry change it out and buy a walbro 255LPH pump for just 60 bucks for more Hp
@@GazaPerformanceGarageGPG Thanks for response. I hope I can do bypass and wait on that specific fuel pump because I do not have the funds for much extra.
Would this be the same on a soarer?
I have ls400 93model
I dont no 12v on fuel pump relay
And no spark on plugs
And no pluse on injector to
Help will be highly apprectated😢
It cranks but not start
Is it the same for LS400?
Yes
Should be if your engine code starts with 1UZ
when you bypass the ECU do do get like air leak coming from the injector when you put the key in the start position
bc im getting air sound or its like fuel near the left side injector when engine is off and key in accessory position
This is because this mod makes your fuel pump run constantly as long as the key is in the on position... the FPCU prevented that previously. The sound you are hearing is likely fuel rushing through your fuel rails. The 1UZ uses a return fuel pressure regulator. This means that the pump pushes the fuel at, let's say upto 120 psi. The fuel flows into the left fuel rail at the fuel pressure damper, through to the fuel pressure regulator on the right rail. The fuel pressure regulator then bleeds off excess fuel pressure (over about 68 psi, if I recall correctly) through a return line back to the fuel tank. This means that fuel is constantly flowing through the fuel rails so long as the pump is running. This is only really a problem if there is a leak in the fuel system, like if you have a leaky injector or if you are in an accident.
If the ecu plug is not showing power to the plug what could be the issue
My 1992 Lexus with 98k miles has a problem of not starting just cranking. I don’t hear the fuel pump kick on when I put the car in on position. Could this be the fuel pump itself or the fuel pump ECU?
First pull the gas tank lid and listen through the filler hole if there is noise or ir pushing out the means the pump is not getting power, then you do a fuel pump ecu bypass,make sure the fuel in the car is good because fuel can lose its luster and turn to oil only and will not start
@@GazaPerformanceGarageGPG I replaced the ecu fuel pump and it started right up. Then I want to say about 2 weeks later I let it sit for about 6 days and went to start it and boom! Won’t start again ! Can I use a paper clip to bypass the ecu I don’t have wire
@@IISOLOIIDOLOII noo my friend that's a fire Waiting to happen, cut the plug off and crimp the the 2 thick wires together
@@GazaPerformanceGarageGPG okay so here is something else you may be able to help. After I unplugged the fuel pump ecu for about 5 Seconds then plug back in. The car franks and wants to die. I then crank again and it starts up no problem then will die again in a couple hours... thanks for the help !
Any guesses ?
How can o get more power in 1995 sc400
Fuel pump ecu bypass fuel pump 255LPH walbro and fuel pressure regulator upgrade
What was your issue that made you do this mod? Was it not starting?
My car runs but seems like it barely gets fuel i have the sc400 now it sounds like a straight pipe sc300
mass air flow meter First and then if it persist then it could be a ECM
what kind of problems does a faulty fuel pump ecu cause?
Mine just died, For mine the car stalled (very softly). After driving and turning it off, I would try to restart it and it would just crank. Also morning startups were longer then usual. Then lastly one morning it would crank, start then die after 10 secs. I jumped two pins at the engine dio port and it started and ran. That told me my ecu was bad
so far it works?
@@skydyleyw0037 It is , got to test it out going to Naha today. Before I was getting a Code 34 DTC also, I was able to redline 1st to 3rd with no issues . Before it would take some time to start , now it starts within 2 seconds I would say. But I also ordered a AEM 320 to replace the stock pump .
@@silversentrav so I'm having your same issue so you say do that ecu bypass?
Good day im invited by maineE
What two wires you jump
The 2 thick wires out of the set
Yu from Irak❤😢😊
No I'm from Jamaica
Gaza means strong city or in this case florida strong 💪
rough idle on my 1995 Lexus sc400 high rpm on cold start and when warm 400rpm and runs rough shaky misfire please help.
I have a video on something like that, I think it's the 2nd or 3rd video I made. But if you don't scan the car it could be a guess. There is also a video on how to scan your car if you don't have a ODBII port
You could need a tune up. Spark, plugs wires, fuel filter, air filter, check coil packs and MAF sensor
@@GazaPerformanceGarageGPG check this out i just scanned the car with a jumper wire because obd1 and check engine just keeps flashing fast and doesn't stop lol smh wow it even let me diagnose codes ..
I did those trick but I just used a butt connector for the green and red wire and it ended up not working , and before it would start for a second and shit off , now it just cranks no start, anybody know why , thanks
Am I creating the jumper one in the red and then the green and black or just the red and green
jumper the red to green
Will is work for the ls400 1996
They all have this set up, I don't know the location
So I jumped mine, burned the wire and melts the harness
Did u figure it out?
of course mine wont start with this trick it just spins lol, maybe not getting good contact, ill probably just end up cutting them and splicing them directly together with a fuse in the middle
Gavin how are you doing? Just a question.
Have you changed your fuel pump?
@@GazaPerformanceGarageGPG i recently got this 94 SC400 and im unaware if its had a fuel pump change, its at about 250k miles though so i suspect it might've been changed at one point
This happened to me, I ended up having the wire ABOVE the pins.
@@Cleavatr0n i was able to get it to work the way he did it, i just had to make the jumper shorter and use a thicker wire to get good contact, but ill deffinetly be permanently wiring it soon. i also just found out my SC400 is missfiring because the ECU needs rebuilt, it has some blown caps
@@spartanreaper911 I recently went through the same deal with the ECU. Kept throwing my car into limp mode and fucking everything up. I sent it to Tanin, got it rebuilt, and everything is good as new. I dunno what Toyota was thinking when they decided to make these things lol...
Will this also work for Aristo JZS147?
I. Not sure if the jzs has it but check the forums
Does this improve the performance if the pump ecu is not bad
Day and night difference
Have a 1997 lx 400 Lexus doing the same thing
Ecu going or gone bad
are the jumper wires copper?
Jump it or Solder them together
No 13mm on a toyota unlucky number
Hey my sc400 won’t crank with key
What is the red cable that you used as a jumper?
I made it. It's a 2" wire and I soldered the ends and while it's hot I flatten it with a pliers
@@GazaPerformanceGarageGPG will a paper clip work?
No my friend, if you want just cut the wire from the clip and crimp them together
Your car can have a fire or electrical problems
@@GazaPerformanceGarageGPG you soldered both ends into the plug ? little confused how you made that
Is this the 12v mod?
I believe so
Mr gaza i just got a 92 sc400 today… i got it from a seller in new york city and i drove it almost 2 hours to Long Island with no problem.. but when i stopped by for a fast food and turned off the engine it wont start anymore.. just endless cranking! i left the car and will comeback tomorrow.. any suggestions ❤️🙏 thanks
Yup that's the Fuel pump ecu bad do, Do the bypass
@@GazaPerformanceGarageGPG i did the bypass already sir’ thanks🙏 but sometimes the fuel pump still won’t kick in? I have to repeat several time and sometimes play around with the ignition until the fuel pump kicks in again and then it will start? Could it be the fuel pump dying out this time? When car runs its smooth… to be honest i like it better than my 97 SC300 manual✌️
@@rp17rionda if it has the original pump from 1992 yes change it, put the walbro 255PLH pump in also unplug the MAF and start it if that could be a problem. my friend what this boils down to is you have to do a full service on the car now. fuel pump, fuel filter, cap and rotor, spark plug and wires
@@GazaPerformanceGarageGPG will do that’ thanks❤️🙏
Normal for it to smell so rich after doing this? 😂
No, its just straight send of fuel pressure thats all
What’s the air intake set up?
This is a k&N 3.2 inch set up
Lol this is reason why the car is in the junkyard in the first place funny cuz its true i have a question is the by pass mode safe?
every almost every SC/LS enthusiast does this mod to save time because when it does go bad its hard to diagnose, im doing this for mine as well since mine went bad.
It is safe, but it can shorten the life of the fuel pump. Luckily the fuel pump isn't hard to source, nor is it expensive to replace.
My shit starts better, runs better, has more power in all situations after this mod
Any errors pop up??
On the dash?
None for me... yet.
ظال في كثره عدنا بتشيلح رخيص
Is this a permanent fix?
This is the ultimate fix and for more power get the walbro 255LPH fuel pump
Why bypass it?
fuel pump ecu went bad, they cost 400buck new and the ones you find in the junk yard no good. so you bypass and get 100% fuel pressure all time thus creating a faster throttle response. and more hp out put
Can that fuel pump ecu relay be repaired?
No this part is sealed but you can tear it apart nothing is impossible. Good question though
@@GazaPerformanceGarageGPG I m a bit confused. Javier said fuel pump ecu relay. Did he mean fuel pump ecu? Is there a fuel pump relay? Or is there just a EFI relay?
@@bmw12347 he meant ECU
@@GazaPerformanceGarageGPG I drained my tank completely. Will the pump still start on an empty tank? I have 12v at the plug going into the sender unit.
@@bmw12347 the pump will run but dont make it run for too long the fuel acts as a cooling agent for the pump
Sent by Mainee ❕
This is the most shotty shit I've seen in a long time. Fix the unit or run a 40am relay.