This is hands down THE best instructional on Fuel Gauge and Sender issues on RUclips. I've watched dozens that don't get anywhere near the clarity and detail that this offers. This doesn't just apply to trucks but explains everything I needed to know for my Mopar gauge issues. You're a legend Kevin ... you should put out a series of instructional videos on Automotive Engineering ... there is a massive audience for it.
I really appreciate these videos. Very informative, well structured, and incredibly helpful. I was very intimidated by the idea of replacing my bad sending unit until I found this. Now I know that I can handle this job myself next weekend instead of paying a shop and waiting forever for them to get to it. These videos have made me a diehard LMC customer.
Great video and great instructional delivery - clear, concise, well structured. Can't imagine why ANYONE would have given it a thumbs-down. Thanks for taking the time to create this video - very helpful!
Glad to see Kevin Tetz on this video. I used to watch him on PowerNation. I have an erratic fuel gauge on my 1985 F150 in which one day it will work okay and the next day the gauge may not work. Looks like I need to check my wiring and maybe clean up the grounding point.
Just when you think everything is right...surprise! Prepping for a car show and noticed the needle on my TA's gas gauge did not move and was buried at the 4 o'clock position (past full) when the engine was started. In the off position it is in the same place. Need to pull out the old Pontiac Service Manual and review along with this video. Electrical is not my favorite problem to figure out. Sometimes I wish a BIG hammer would work...it doesn't. Thank's Kevin for another great video.
Thankyou! I am getting ready to take on this job myself.. I replaced my gauge cluster when we restored the truck, but never replaced the sending unit in the tank. My gauge work fine for 3 years, but now stays on 1/4 tank.
This video is helpful to me, I have a 1971 Chevrolet C-10 that I'm restoring to original and starting to see people getting their 1967-1972 Chevy/GMC trucks running again. Keep loading up and making more videos about these classic trucks, I know I'll be ordering some stuff from LMC Truck real soon. Good video 👍🇺🇸..
One more thing, the float sensor can be serviced in many cases. The arm cover should be able to come off and inside that box there can be rust or corrosion or something that obstructed sensing by the potentiometer or smooth travel of the arm. Clean it all up and try it. It might need sanding, contact cleaner, you'll see what it needs.
I had a question on an older video but the comments were turned off…anyways…it was about the bumper impact strip. All I want to know is if it’s really necessary to put one on? Or if I can buy a bumper w/o the impact strip holes for a more smooth look.
Hey Oz Mechanic. I have a Hyundai i20 2010 model. I took it to Hyundai for checking because I had issue with my fuel gauge reading and they concluded by saying I need to get my instrument cluster replaced, which too much for to afford. I want to know is it not possible to fix the fuel gauge reading without having to replace the cluster as they said because everything working on the cluster except incorrect fuel reading display? Your advice would be highly appreciated.
I'm looking to pull my tach into the place of my fuel gauge and need an aftermarket fuel gauge for under dash mount and the wiring color cost to rewire it from the wiring harness to aftermarket gauge.
Thank you for the video! I own a 1959 Chevy Apache and I was wondering what is the best way to determine if is necessary to replace the fast tank? I know that it works and the gas pump works however the truck 🛻 it’s been sitting in the garage for over 15 years!
⚡👍⚡ i hear the resistor behind gage is hard to find. Does LMC sell those? I'm guessing NOT, seeing the fuel gage ya sell doesn't have it. Thanks for sharinv. Ill be ordering in the future
A good learning,..but I can't seem to get my brand new meter to go to full with the sensor disconnected and 12v applied to the ignition terminal. With ground to ground, sensor to sensor, and ignition 12v to ignition terminal my needle barely moves and rests just at 'E'. I've measured 70 ohms with two different meters from ground at tank to sensor on tank. I measured 70 ohms at gauge location from sensor lead to ground under dash. What do I need to do??
Could this testing procedure be used to test the other gauges as well? My temp gauge and amp meter gauge are not working. I'd like to be able to test them before replacing them, or the circuit board.
I have a 71 Chevelle I pulled the fuel tank and replaced the sending/float unit because the gauge would stick on fuel and drop and start reading at some point. I just never knew when it was going to drop and start reading. I noticed that the stop tabs for full and empty were bent off to the side. When I pushed the float all the way up past the full tab it would stick there. So when I installed the new sending unit I did not bend the tabs. Now when the tank is full the gauge read between 3/4 and 1/2. Once the fuel gets down between 3/4 and 1/2 then the gauge works. Any ideas on what’s wrong?
I'll have to put this to the test. I've got a 72 Blazer with a misfunctioning fuel gauge. It keeps track of my fuel but only goes to just above the quarter tank mark. So quarter tank is actually full, eighth tank is actually a half tank etc. I've replaced the sending unit, the gauge, the wiring, and the grounds that I can find. The only thing left seems to be the printed circuit board.
Caution here. If you ever so slightly turn those studs. You will break a very tiny wire. I did that. Drilled the rivets soldered a .005 wire back to the stud riveted back together works as new.
The battery testing reminded me of teaching biology students how to setup an electrophoresis chamber , where I would tell them there was an easy to remember poem that would help them with the assembly; "red to red, black to black"
Question, my nephew is trying to fix the fuel sending unit in an old car. The wire that is inside the tank is real nasty looking, the insulation is rotted off the copper wire. Can anyone tell me what kind of wire will he need to get to replace the rotted wire? Guess it'll be a wire that will ok to be in contact with gasoline.
I have a 1980 K10 with dual tanks every time the key is on the fuel gauge goes straight to full and there are no changes if I toggle the dash tank switch any advise?
Does anybody know what “REQ’d” on the website means? I just don’t want to order to if they come in packs of two l. For instance the sun visors says REQd 2, so does that mean they come with two if I put the quantity at 1?
Hello, the REQD column indicates how many of a respective part a truck would need to be complete. In your case the sun visors are sold individually, you would need 2 to complete the truck.
I've never seen a gauge re-calibration video. The 70's Chevy gauges can be re-calibrated. Maybe others, I don't know. Have you ever had an old Chevy and the fuel gauge "worked" but didn't show the correct fuel level? The needle never goes to full or goes past full. Or when it's empty the needle is sitting on a quarter tank. Like the man said three times, "It's a range. Not an exact measurement." So how do you get the gauge to jive with the range of the sending unit? How can you custimize your fuel gauges displayed reference points? The hard part is get the lense off and the sending unit out.
Does Anyone can help me ? I have a chevy van from 6,2 diesel from 1983 , my problem is that when i turn the key for starting my van , the gauge of the coolant température , go very kwickly at the maximum, at the top , the engine is still cold , does anyone got an idea to solv the problem
if you use a reed switch sender you dont need all stuff only moving part is floating magnet 33ohms full 244 empty U S A standard 5 hole munting use same gauge
Mine doesn’t work due to the sending unit located in the tank, reset trip odometer and seek fuel before it reaches 300km Fuel guage always shows 1/2 full
Hi I have a 84 GMC Sierra stepside which 2 tanks My 2 tanks mark same Wend tank is full my meter show 1/2 tank And wend is empty mark empty Never mark all the way up wend is full Thanks
"Normally, wiring issue are high on the difficulty meter, but If you isolate the fuel system by itself, it's not that difficult" Me looking at the wiring diagram and seeing all the common/shared circuits... o.O XD!!!
Hey Kevin. Why don't you just test the send unit at the pump and thus verify the entire circuit or not them u could go back and start at the battery. Or you could just work backwards.
@Carlos Roque yes there are lots of way to test the pump. You could test the resistance. You could unplug it and give it a ground and power it up with 12v. The easiest way to give it a very basic test is to have someone cycle the key from off to on a few times and while the do that wack the bottom of the tank with a rubber mallet. Preferably right under the pump. You can tell where the pump is by looking for a maybe 6 to 8" diameter circle in the bottom of the tank. Usually if the pump is the issue it will kick on. But only for about 2 seconds. To prime the line and once the car starts it will come back on.
The old trucks do not have electric fuel pumps. They use a mechanical pump mounted to the block. If you’ve upgraded to an electric pump (usually with a pressure regulator for a carburetor use) then you’d be able to diagnose differently.
So..2 years ago, I asked a mechanic to replace my 1998 Dodge Caravan 2.4L fuel filter that was changed 22 years ago. When he did it he cracked the fuel pump connectors and it leaked gas. I paid for the part and he did labor free. Bosch. The gauge read low. Still had 5 gallons left when gauge was at E. He replaced it and same level issue. I said forget it and was same for 2 years and 2 months. The sensor started making the fuel gauge needle go down and the chime came on with the gas tank idiot light coming on. I GOOGLED it and saw complaints like this and saw might be caused by sulfur in gas tarnishing the metal on the sensor metal.. I put in 2 bottles of Techron plus and for a time chime was lot less but now is awful!. So far I can't find what metal the sensor windings are made of for BOSCH. I see 2 brands, one using gold (Delphi) and other silver palladium. THEN... I see ranges of 70 to 1050 OHMS for replacement pumps (ON Rock Auto info on their pump assortments. and then I see 33 to 240 for Bosch and American makes. I was about to put a cheat resistor in the harness to make it so I could stop the low level CHIME stop. BUT now I don't know what value to put in. I was going to put in a 680 or 750 OHM but when I saw this new range. I put a temp hold on this cheat. The gauge anti- slosh makes the needle move slower but the chime comes on right away. I think the float needle is getting to a dead high OHM spot on the sensor. I found out a couple weeks ago that Bosch went to a lifetime warranty.. but there are qualifiers and so I will see what push back I get from Bosch.
My only criticism is I need close up video of how he connects the wires to the sending unit and guage. My 51 year old eyes can't see that far away. This will take the guesswork out of it.
Poorly thought out video. There is a way to determine if your sending unit is bad without having to pull the sending unit and doing the 0-50-100 test. Also need to do one with dual tanks.
Unsubscribing. You tube shut down comments on the White House channel but will not do the same to biden, political discrimination is wrong and I am preparing to leave you tube. I have enjoyed you videos and wish you well in the future
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
This is hands down THE best instructional on Fuel Gauge and Sender issues on RUclips. I've watched dozens that don't get anywhere near the clarity and detail that this offers. This doesn't just apply to trucks but explains everything I needed to know for my Mopar gauge issues. You're a legend Kevin ... you should put out a series of instructional videos on Automotive Engineering ... there is a massive audience for it.
Glad it helped
This guy is probably one of the coolest. He actually teaches you instead of act arrogant like some other mechanics.
He is more than just a mechanic. He what most mechanics wants to be
I can’t believe the timing of this video popping up.
I’m trouble shooting my 1991 B300 Dodge van fuel system today.
Perfect timing Thanks!
Kevin Tetz is the best lol. I've loved this dudes videos for years
By far the best diagnosis of this system, dude is a wealth of knowledge
Kevin. Your the truth man! Finally someone who knows how to explain stuff and does it well. Thank you for all you do bro
I really appreciate these videos. Very informative, well structured, and incredibly helpful. I was very intimidated by the idea of replacing my bad sending unit until I found this. Now I know that I can handle this job myself next weekend instead of paying a shop and waiting forever for them to get to it. These videos have made me a diehard LMC customer.
Great video and great instructional delivery - clear, concise, well structured. Can't imagine why ANYONE would have given it a thumbs-down. Thanks for taking the time to create this video - very helpful!
Glad to see Kevin Tetz on this video. I used to watch him on PowerNation. I have an erratic fuel gauge on my 1985 F150 in which one day it will work okay and the next day the gauge may not work. Looks like I need to check my wiring and maybe clean up the grounding point.
Great...explanation, No One did Like You.
Appreciate You - From Sri- Lanka -
Just when you think everything is right...surprise! Prepping for a car show and noticed the needle on my TA's gas gauge did not move and was buried at the 4 o'clock position (past full) when the engine was started. In the off position it is in the same place. Need to pull out the old Pontiac Service Manual and review along with this video. Electrical is not my favorite problem to figure out. Sometimes I wish a BIG hammer would work...it doesn't. Thank's Kevin for another great video.
Thankyou! I am getting ready to take on this job myself.. I replaced my gauge cluster when we restored the truck, but never replaced the sending unit in the tank. My gauge work fine for 3 years, but now stays on 1/4 tank.
Cool tool and that is the best glass cleaner ever......
Thanks a lot! that was very informative, and your style is easy to follow!
This is educating. I love it
Wonderful video. Very well demonstrated and clearly explained. Thank you!
Thank you for taking the time to watch. We appreciate the support.
This video is helpful to me, I have a 1971 Chevrolet C-10 that I'm restoring to original and starting to see people getting their 1967-1972 Chevy/GMC trucks running again. Keep loading up and making more videos about these classic trucks, I know I'll be ordering some stuff from LMC Truck real soon. Good video 👍🇺🇸..
I got a 1986 c10 and I'm restoring to be fast 🏎🏎🏎🏎🇺🇸
@@Austin-ro4bv Cool💪👍🇺🇸..
@@fredmartine674 💪💪
Glad you found it helpful
Nice explain , cheers from France
Awesome video. The only part not included is tracing the two wires back up thru the printed circuit thru the harness into the panel and wherever
Very nice and precise
Great video, nicely organized and detailed
One more thing, the float sensor can be serviced in many cases. The arm cover should be able to come off and inside that box there can be rust or corrosion or something that obstructed sensing by the potentiometer or smooth travel of the arm. Clean it all up and try it. It might need sanding, contact cleaner, you'll see what it needs.
Thank you for this info
Awesome explanation! I’m about to go down that road this weekend. Gas gauge stuck on Full and doesn’t read the gas in the tank.
Thanks for the instruction !
Got my wish list today
...aka...parts catalog for my 77 f150
Is it ever recommended or needed to replace the gas tank? Nicely done video! Thanx for your efforts…❤
Great video guys! Need more videos like this. 👍
I had a question on an older video but the comments were turned off…anyways…it was about the bumper impact strip. All I want to know is if it’s really necessary to put one on? Or if I can buy a bumper w/o the impact strip holes for a more smooth look.
Great video, this has been a topic of discussion many times at my shop. Thank you for the info. 👍
Glad we could help.
Hey Oz Mechanic. I have a Hyundai i20 2010 model. I took it to Hyundai for checking because I had issue with my fuel gauge reading and they concluded by saying I need to get my instrument cluster replaced, which too much for to afford.
I want to know is it not possible to fix the fuel gauge reading without having to replace the cluster as they said because everything working on the cluster except incorrect fuel reading display?
Your advice would be highly appreciated.
I'm looking to pull my tach into the place of my fuel gauge and need an aftermarket fuel gauge for under dash mount and the wiring color cost to rewire it from the wiring harness to aftermarket gauge.
Thank you for the video! I own a 1959 Chevy Apache and I was wondering what is the best way to determine if is necessary to replace the fast tank? I know that it works and the gas pump works however the truck 🛻 it’s been sitting in the garage for over 15 years!
⚡👍⚡ i hear the resistor behind gage is hard to find. Does LMC sell those? I'm guessing NOT, seeing the fuel gage ya sell doesn't have it. Thanks for sharinv. Ill be ordering in the future
A good learning,..but I can't seem to get my brand new meter to go to full with the sensor disconnected and 12v applied to the ignition terminal.
With ground to ground, sensor to sensor, and ignition 12v to ignition terminal my needle barely moves and rests just at 'E'. I've measured 70 ohms with two different meters from ground at tank to sensor on tank.
I measured 70 ohms at gauge location from sensor lead to ground under dash.
What do I need to do??
great video thanks forn your help
YESSSSS keep making more videos 💪💪👍👍💪
Could this testing procedure be used to test the other gauges as well? My temp gauge and amp meter gauge are not working. I'd like to be able to test them before replacing them, or the circuit board.
What would cause a guage to read well below e when I key on ? The needle will go all the way to the left when it’s keyed on
Looking to upgrade the auxiliary side tanks 4 way switch controls.
I enjoy the video, and the test part great .!!!!
Thank you! For this great 👍 información Master.
I have a 71 Chevelle
I pulled the fuel tank and replaced the sending/float unit because the gauge would stick on fuel and drop and start reading at some point. I just never knew when it was going to drop and start reading.
I noticed that the stop tabs for full and empty were bent off to the side.
When I pushed the float all the way up past the full tab it would stick there.
So when I installed the new sending unit I did not bend the tabs.
Now when the tank is full the gauge read between 3/4 and 1/2.
Once the fuel gets down between 3/4 and 1/2 then the gauge works.
Any ideas on what’s wrong?
I hope I could fix it
My gauge is reading pass full all the time..i just replaced the gauge from LMC and still doing the same thing. Any advice?
Did you get help also mine doing same thing
@ Ended up being the ground wire from the fuel sending unit. Make sure it has a good ground and the surface is clean of debris.
So is the sending unit the same as the fuel pump
Is the fuel pump the sending unit?
With my '79 Chevy one is in the gas tank the other is on the engine.
How can I get a catalog for a 1987 1500 Silverado and a 94 Silverado?
You can request a catalog here, www.lmctruck.com/freetruckpartscatalog
@@Lmctruck1 thank you sr
Where is the sending unit located on the fuel pump?
Kevin I have a cucv, I would like to make it dual tank. I only have the 2nd tank. Its mechanical pump diesel, how do I make a dual tank a reality.
I'll have to put this to the test. I've got a 72 Blazer with a misfunctioning fuel gauge. It keeps track of my fuel but only goes to just above the quarter tank mark. So quarter tank is actually full, eighth tank is actually a half tank etc. I've replaced the sending unit, the gauge, the wiring, and the grounds that I can find. The only thing left seems to be the printed circuit board.
Caution here. If you ever so slightly turn those studs. You will break a very tiny wire. I did that. Drilled the rivets soldered a .005 wire back to the stud riveted back together works as new.
Will LMC ever make the 88-98 silverado dashboards
The battery testing reminded me of teaching biology students how to setup an electrophoresis chamber , where I would tell them there was an easy to remember poem that would help them with the assembly; "red to red, black to black"
If you are checking Old gauge, and you apply power the needle moves forward pass full, but when you remove power the needle will not return to empty
What would cause the needle to go way past full?
Full battery voltage
Question, my nephew is trying to fix the fuel sending unit in an old car. The wire that is inside the tank is real nasty looking, the insulation is rotted off the copper wire. Can anyone tell me what kind of wire will he need to get to replace the rotted wire? Guess it'll be a wire that will ok to be in contact with gasoline.
does lmc ship to Hawaii?
I have a 1980 K10 with dual tanks every time the key is on the fuel gauge goes straight to full and there are no changes if I toggle the dash tank switch any advise?
Float is probably stuck. Drop tank and check sending unit.
@@shooterpcb Thanks will do when i'm not so lazy ;)
Does anybody know what “REQ’d” on the website means? I just don’t want to order to if they come in packs of two l. For instance the sun visors says REQd 2, so does that mean they come with two if I put the quantity at 1?
Hello, the REQD column indicates how many of a respective part a truck would need to be complete. In your case the sun visors are sold individually, you would need 2 to complete the truck.
@@Lmctruck1 perfect! Thanks! I got a big order coming your way ;) Y’all gave me motivation to complete the restoration on my truck.
How did you know I was having this issue.
I've never seen a gauge re-calibration video. The 70's Chevy gauges can be re-calibrated. Maybe others, I don't know.
Have you ever had an old Chevy and the fuel gauge "worked" but didn't show the correct fuel level?
The needle never goes to full or goes past full. Or when it's empty the needle is sitting on a quarter tank.
Like the man said three times, "It's a range. Not an exact measurement." So how do you get the gauge to jive with the range of the sending unit? How can you custimize your fuel gauges displayed reference points?
The hard part is get the lense off and the sending unit out.
Do you ship to Hawaii ??
Hello, yes we ship to Hawaii. Please give us a call we're happy to help.
95 ford ranger.gauge was working until new fuel pump was installed. Now gauge stays past full
Does Anyone can help me ? I have a chevy van from 6,2 diesel from 1983 , my problem is that when i turn the key for starting my van , the gauge of the coolant température , go very kwickly at the maximum, at the top , the engine is still cold , does anyone got an idea to solv the problem
Wire is off or sending unit is shorted out. Ohm across it and see if it has infinite resistance....
if you use a reed switch sender you dont need all stuff only moving part is floating magnet 33ohms full 244 empty U S A standard 5 hole munting use same gauge
Mine doesn’t work due to the sending unit located in the tank, reset trip odometer and seek fuel before it reaches 300km
Fuel guage always shows 1/2 full
Hi I have a 84 GMC Sierra stepside which 2 tanks
My 2 tanks mark same
Wend tank is full my meter show 1/2 tank
And wend is empty mark empty
Never mark all the way up wend is full
Thanks
how much does it cost to restore a ford f250 86
GRACIAS POR LOS VIDEOS
Can I receive a Ford LMC truck magazine please. Late '60s...
Hello. Please see the link below to request a free catalog www.lmctruck.com/freetruckpartscatalog
"Normally, wiring issue are high on the difficulty meter, but If you isolate the fuel system by itself, it's not that difficult" Me looking at the wiring diagram and seeing all the common/shared circuits... o.O XD!!!
I had fuel gauge problems in my C20 1970. I really sorry I sold the truck.
Hey Kevin. Why don't you just test the send unit at the pump and thus verify the entire circuit or not them u could go back and start at the battery. Or you could just work backwards.
@Carlos Roque yes there are lots of way to test the pump. You could test the resistance. You could unplug it and give it a ground and power it up with 12v. The easiest way to give it a very basic test is to have someone cycle the key from off to on a few times and while the do that wack the bottom of the tank with a rubber mallet. Preferably right under the pump. You can tell where the pump is by looking for a maybe 6 to 8" diameter circle in the bottom of the tank. Usually if the pump is the issue it will kick on. But only for about 2 seconds. To prime the line and once the car starts it will come back on.
The old trucks do not have electric fuel pumps. They use a mechanical pump mounted to the block. If you’ve upgraded to an electric pump (usually with a pressure regulator for a carburetor use) then you’d be able to diagnose differently.
So..2 years ago, I asked a mechanic to replace my 1998 Dodge Caravan 2.4L fuel filter that was changed 22 years ago. When he did it he cracked the fuel pump connectors and it leaked gas. I paid for the part and he did labor free. Bosch. The gauge read low. Still had 5 gallons left when gauge was at E. He replaced it and same level issue. I said forget it and was same for 2 years and 2 months. The sensor started making the fuel gauge needle go down and the chime came on with the gas tank idiot light coming on. I GOOGLED it and saw complaints like this and saw might be caused by sulfur in gas tarnishing the metal on the sensor metal.. I put in 2 bottles of Techron plus and for a time chime was lot less but now is awful!. So far I can't find what metal the sensor windings are made of for BOSCH. I see 2 brands, one using gold (Delphi) and other silver palladium.
THEN... I see ranges of 70 to 1050 OHMS for replacement pumps (ON Rock Auto info on their pump assortments. and then I see 33 to 240 for Bosch and American makes. I was about to put a cheat resistor in the harness to make it so I could stop the low level CHIME stop. BUT now I don't know what value to put in. I was going to put in a 680 or 750 OHM but when I saw this new range. I put a temp hold on this cheat. The gauge anti- slosh makes the needle move slower but the chime comes on right away. I think the float needle is getting to a dead high OHM spot on the sensor. I found out a couple weeks ago that Bosch went to a lifetime warranty.. but there are qualifiers and so I will see what push back I get from Bosch.
where is fuse for fuel gage
It’s crazy when it works then it don’t kills me I think it’s a ground wire
My only criticism is I need close up video of how he connects the wires to the sending unit and guage. My 51 year old eyes can't see that far away. This will take the guesswork out of it.
What about a leaky float nobody ever talks about the float can leak
its too bad LMC doesnt consider an el camino a truck...
Si mañana
DIAGNOSE IT ON THE TRUCK BEFORE YOU HAVE TO TAKE THE SENDER OFF. WHAT ABOUT WIRING. FAR FROM REALITY BUT ACCURATE ON A BENCH.
Poorly thought out video. There is a way to determine if your sending unit is bad without having to pull the sending unit and doing the 0-50-100 test. Also need to do one with dual tanks.
Make your own video you narcissist 🤡
guage
Unsubscribing. You tube shut down comments on the White House channel but will not do the same to biden, political discrimination is wrong and I am preparing to leave you tube. I have enjoyed you videos and wish you well in the future
Your loss. Your choice. These truck videos are helpful no matter your political preferences.
Someone please answer this. If I made all the right connections and the fuel gauge keeps moving to past full does that mean the gauge is faulty
Most likely, yes.