1998 0411 swap fuel gauge is not working

Hi everyone!

I just finished up my 0411 swap on my 98 K1500. Everything is perfect, except for the fuel gauge. Its pegged beyond full. Does anyone have any data on how to calibrate this correctly? I have EFI Live.

Here's some photos of what's in the tune currently

Is the easiest way to make the fuel gauge work, to just install a 96-97 fuel sender, 96-97 gauge cluster, and bypass the ECM? Go straight to the gauge cluster?

First thing, what operating system are you running? If you use the wrong one it may not have the PWM driver enabled on the ecu.

These are the correct setting, adjust fuel tank size to match what you have. I use HP Tuners, but you should have these tables in your program, they might be called something different.

kylenautique said:

Is the easiest way to make the fuel gauge work, to just install a 96-97 fuel sender, 96-97 gauge cluster, and bypass the ECM? Go straight to the gauge cluster?

Click to expand...

96-97 still use a pwm driver from the computer to run the fuel gauge. You can't run it "straight to the cluster"

Awest623 said:

First thing, what operating system are you running? If you use the wrong one it may not have the PWM driver enabled on the ecu.

These are the correct setting, adjust fuel tank size to match what you have. I use HP Tuners, but you should have these tables in your program, they might be called something different.

You must be registered for see images attach

Click to expand...

Dude thank you so much! That was the issue. I had to run the tune through Tunercats to enable the PWM fuel gauge. EFI Live didn't support that for some reason. Its working now. This website is the best!

Awest623 said:

First thing, what operating system are you running? If you use the wrong one it may not have the PWM driver enabled on the ecu.

These are the correct setting, adjust fuel tank size to match what you have. I use HP Tuners, but you should have these tables in your program, they might be called something different.

You must be registered for see images attach

Click to expand...

Question for you. So my fuel gauge is working, but the problem is when I fill it up, the gauge goes to empty. I drive about 40 miles, and it starts slowly moving towards the full mark. I hit about 65 miles and it goes to full and starts going down. It looks like I have the same data tables as you. My tank however is a 26 gallon fuel tank. The primary sender volume table goes all the way to 30.0 Originally the tune was programmed for a 30 gallon tank. I changed that. I also changed the primary sender volume from 30 to 26.6. Is this the correct way to set my gauge? Should I change it to 26?

Original Programming


Edited Programming


I changed the primary fuel tank size from 30 to 25.9. The black box programming uses 25.9 as the take size, so I figured rinse and repeat... right?

Just filled up. My gauge sits at barely above 1/2 full with a full tank of gas. I've reset the trip meter so I can drive and see how long until it goes to full. Does anyone have the correct fuel primary volume vs level (HP tuners) Primary to sender to vol gal (EFI Live) data to make the fuel gauge work properly on a a truck with a 25 gallon tank?

Awest623 said:

96-97 still use a pwm driver from the computer to run the fuel gauge. You can't run it "straight to the cluster"

Click to expand...

96-97 does not use the PCM at all. They use a fuel level buffer module. On my 97 van it is behind the column trim, under the cluster. Would be easy to snag from a 96-97 Express/Savanna van.

L31MaxExpress said:

96-97 does not use the PCM at all. They use a fuel level buffer module. On my 97 van it is behind the column trim, under the cluster. Would be easy to snag from a 96-97 Express/Savanna van.

Click to expand...

my truck is a 98.