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28/11/2020 2:01 pm
Topic starter
- I have a Gm 2500hd 4x4 with both banks too rich codes. There's no fuel controller on this model and the regulator is in the tank with no return fuel line. The pump is a new gm model and have changed out the fuel injectors with Gm parts(also with 4 aftermarket pumps). Fuel pressure is at 80psi and the fuel trim is at -30 on both banks. This truck has been to 3 different dealers and they can't diagnose what's wrong. No other code are on the computer and the computer has had a complete reset after each pump change. If any ideas that can help would be a great help. Thanks for your time and thanks for the UTUBE channel, Ben.
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28/11/2020 2:20 pm
Did you check the air filter and MAF sensor?
@yaser
Everything is within limits except the fuel pump pressure and ltft.