im currently working on cx7 the in tank pump works so i got a used hpfp and replaced still nothing work even start. i'll try getting something to measre fuel press. with key on
J.E.Y Cars you know, i never blew through it the opposite way. But in my case the relief valve was dead as a door nail. A good sign is it’s brand new in packaging lol, or you can’t blow through it. What issues are you having?
Basically i think i got bad gas. Then the car would start. Stay on for a little while then die once it gets to operating temperature. And won’t start if its hot. Did that for a day. Then the next day it wouldn’t stay on at all. The only way it would stay on is to give it full throttle. N it wouldn’t even go pass 700 rpm. And it was missing really bad. Then i drained the gas. Cleaned everything. Then put new gas. Same thing. And it would give out black smoke. Then finally I unplugged the hpfp connector then it would start normally. It drives. But doesn’t hit boost at all. And every time i plug in the connector of the hpfp. It dies. I bought a pump from ebay thinking its the pump. But it still does the same thing if the pump is connected. I thought it was the relief valve. I took it out to test it. But i cant blow into it at all. Now idk wat is wrong with it. And i still dont get no hpfp reading from my accessport. Its always 0 since it started missing. I know its a lot to read. But please help. My car has been sitting for a week. And corona making things hard.
Hey man, i dont mind helping anyone out. First let me ask some questions, when you say clean everything what do you mean? did you clean the HPFP? that being said, black smoke isnt always a bad sign, black normally means gas, and based on your other issues it would seem that your having some fueling problems. If the HPFP is unplugged it means that the only gas hitting your fuel rail is from you intank pump. I am honestly surprised it started with it unplugged. Your fuel pressure from the intank pump is negligible compared to the amount you need to run the car, let alone make boost. If you cant blow through the relief valve than i would say thats not your issue. Do you have a link to the pump you bought? You have any codes poping up on the AP? You check your plugs? It's definitely seems to be having a problem with the fuel system up front.
Yes. I definitely think its a fuel problem. It starts without the pump being connected. But im pretty sure fuel runs through the hpfp. Maybe its just not sending high pressure fuel. But the codes i have are p0091 and p2188. I had just changed my spark plugs. I think everything works fine except the fuel pump. Maybe the internal went bad. Because when i plug it in. It makes a whistling noise. Kind of wining noise too. Then dies. When said cleaned. I meant the gas tank and the lines. The hpfp i replaced it. And it was the stock one and didn’t work so i put mines back on. Since i have aftermarket internals.
J.E.Y Cars see a whistle or a whine leads me to believe that the pump is dead or the relief valve is dead. But since the relief valve is intact and you aren’t getting fuel pressure at all, I’d say it’s you fuel pump. You got an IG? Any photos of what you bought?
I’m not sure if Im having the same problem but when I start my car it struggles to start up well making a engine bust sound but it always does start up. Also when I’m driving and try to accelerate it is as response as it should because you feel the vehicle stall. So could it be a pressure valve I need some help
What was your wot hpfp pressure did you ever get the chance to see? My car is dropping from 1800 to like 400 with wide open throttle but literally everything else is preemo
@@NewOrleansSpeed idles like 11 or 1200 cold and 800 warm afr is good boost is steady and it pulls Hella hard "also tuned by pd tuning" but wot after maybe 2k rps you can feel it fall on its face but it'll spin in second and third in the wet until my hpfp actual drops so I'm thinking it's the fuel pump internal but no actual clue
@@FlyLikeRedBull boyyyyyyyyy I would not be flooring it if its acting like that (even tho i did the same thing lol). It could be the hpfp, what brand do you have? How many miles? You run e85?
@@NewOrleansSpeed runs 93 69k miles and cobb fp internals I believe but don't know the prior owner put them in so I assume it's probably it causes the drop
@@FlyLikeRedBull I’m having this same issue right now half throttle I’ll hold boost and at 1700 but at WOT it’s dropping to 800 so ima do a e85 rebuild kit and see what happens
Do you know if a bad relief valve could cause the fuel pressure being too high and not being able to correctly lower the pressure? That seems to be the case on my car and the fuel pressure sits way too high constantly. At idle its trying to target around the 400 range but sits around 1200 to 1400 causing a rich condition. Tried cleaning everything intake related and checked for any leaks. My fuel trims are always pegged at -25 and adjusting the MAF calibration does not fix it either. I do have HPFP internals.
im not sure dude, let me think. In the mean time this link helped me a ton in finding my fuel issue. Here you go: corksport.com/blog/hpfp-troubleshooting/
@@juanmcar00 Yes cleaned my pump and it was actually the turbo going bad too. The turbine was seized at low boost and rpm, restricting air and causing a rich condition. it would spool up if you pushed the car oddly enough.
@@dot_boi I’m having a similar issue, I’m also having really high pressure with the ignition on, I was trying to do the pressure relief test. And it went down VERY SLOWLY
Maybe read the description before you comment. Otherwise lmk if you need anything! Thanks all
solid vid brotherman!
Tom Canino i appreciate it dude!
im currently working on cx7 the in tank pump works so i got a used hpfp and replaced still nothing work even start. i'll try getting something to measre fuel press. with key on
thank you so much for the video! very helpful
Hey. Nice video. But did your relief valve blow both ways? And what are the signs of a good relief valve?
J.E.Y Cars you know, i never blew through it the opposite way. But in my case the relief valve was dead as a door nail. A good sign is it’s brand new in packaging lol, or you can’t blow through it. What issues are you having?
Basically i think i got bad gas. Then the car would start. Stay on for a little while then die once it gets to operating temperature. And won’t start if its hot. Did that for a day. Then the next day it wouldn’t stay on at all. The only way it would stay on is to give it full throttle. N it wouldn’t even go pass 700 rpm. And it was missing really bad. Then i drained the gas. Cleaned everything. Then put new gas. Same thing. And it would give out black smoke. Then finally I unplugged the hpfp connector then it would start normally. It drives. But doesn’t hit boost at all. And every time i plug in the connector of the hpfp. It dies. I bought a pump from ebay thinking its the pump. But it still does the same thing if the pump is connected. I thought it was the relief valve. I took it out to test it. But i cant blow into it at all. Now idk wat is wrong with it. And i still dont get no hpfp reading from my accessport. Its always 0 since it started missing. I know its a lot to read. But please help. My car has been sitting for a week. And corona making things hard.
Hey man, i dont mind helping anyone out. First let me ask some questions, when you say clean everything what do you mean? did you clean the HPFP? that being said, black smoke isnt always a bad sign, black normally means gas, and based on your other issues it would seem that your having some fueling problems.
If the HPFP is unplugged it means that the only gas hitting your fuel rail is from you intank pump. I am honestly surprised it started with it unplugged. Your fuel pressure from the intank pump is negligible compared to the amount you need to run the car, let alone make boost.
If you cant blow through the relief valve than i would say thats not your issue. Do you have a link to the pump you bought? You have any codes poping up on the AP? You check your plugs? It's definitely seems to be having a problem with the fuel system up front.
Yes. I definitely think its a fuel problem. It starts without the pump being connected. But im pretty sure fuel runs through the hpfp. Maybe its just not sending high pressure fuel. But the codes i have are p0091 and p2188. I had just changed my spark plugs. I think everything works fine except the fuel pump. Maybe the internal went bad. Because when i plug it in. It makes a whistling noise. Kind of wining noise too. Then dies. When said cleaned. I meant the gas tank and the lines. The hpfp i replaced it. And it was the stock one and didn’t work so i put mines back on. Since i have aftermarket internals.
J.E.Y Cars see a whistle or a whine leads me to believe that the pump is dead or the relief valve is dead. But since the relief valve is intact and you aren’t getting fuel pressure at all, I’d say it’s you fuel pump. You got an IG? Any photos of what you bought?
I pulled the fuse and started my car, it struggled to start but did not die, what should i do?
Anyone know the part number? The only part I can find says it fits the CX-7 and I can't find anything for the Mazdaspeed 3
I’m not sure if Im having the same problem but when I start my car it struggles to start up well making a engine bust sound but it always does start up. Also when I’m driving and try to accelerate it is as response as it should because you feel the vehicle stall. So could it be a pressure valve I need some help
Isn’t *
if it sounds like metal slapping it is most likely your VVT going out and it will need to be replaced
What’s the part number of the relief valve?
I idle at 350-370 and i peak at around 1200 which sucks. i also just bought the PRV and i hope this fixes my issue.
Did you ever figure out your issue? Mine does this also
Quick question did u have a code by any chance??
by chance did the fuel pressure drop to 0 at anytime
No, never 0, but it was extremely low, like 100s
What was your wot hpfp pressure did you ever get the chance to see? My car is dropping from 1800 to like 400 with wide open throttle but literally everything else is preemo
something like that did happen, what are you idling at??
@@NewOrleansSpeed idles like 11 or 1200 cold and 800 warm afr is good boost is steady and it pulls Hella hard "also tuned by pd tuning" but wot after maybe 2k rps you can feel it fall on its face but it'll spin in second and third in the wet until my hpfp actual drops so I'm thinking it's the fuel pump internal but no actual clue
@@FlyLikeRedBull boyyyyyyyyy I would not be flooring it if its acting like that (even tho i did the same thing lol). It could be the hpfp, what brand do you have? How many miles? You run e85?
@@NewOrleansSpeed runs 93 69k miles and cobb fp internals I believe but don't know the prior owner put them in so I assume it's probably it causes the drop
@@FlyLikeRedBull I’m having this same issue right now half throttle I’ll hold boost and at 1700 but at WOT it’s dropping to 800 so ima do a e85 rebuild kit and see what happens
Is this the same for a 09’ speed 3?
Should be, but i would double check the forums!
Did you throw a cel with the faulty relief valve?
MIKE_MX5_ no which made it difficult to find the issue unless you know what to look for
Do you know if a bad relief valve could cause the fuel pressure being too high and not being able to correctly lower the pressure?
That seems to be the case on my car and the fuel pressure sits way too high constantly. At idle its trying to target around the 400 range but sits around 1200 to 1400 causing a rich condition. Tried cleaning everything intake related and checked for any leaks. My fuel trims are always pegged at -25 and adjusting the MAF calibration does not fix it either. I do have HPFP internals.
im not sure dude, let me think. In the mean time this link helped me a ton in finding my fuel issue. Here you go: corksport.com/blog/hpfp-troubleshooting/
Ever find out what the issue was ? Im have the same problem.
@@juanmcar00 Yes cleaned my pump and it was actually the turbo going bad too. The turbine was seized at low boost and rpm, restricting air and causing a rich condition. it would spool up if you pushed the car oddly enough.
@@dot_boi I’m having a similar issue, I’m also having really high pressure with the ignition on, I was trying to do the pressure relief test. And it went down VERY SLOWLY
I have 900 psi of fuel pressure at idle
You fix that?
talking hand drives me nuts
Cousin it