Quote:
Originally Posted by Irace86.2.0
Fuel filter/pump? I mentioned this before. No one commented unless I missed it.
Edit: My dad’s GMC 2500 cut out power and went to limp mode. I sounded like the turbo was bypassed. The truck would not go faster than 45mph or rev as high. He changed a clogged filter, and it immediately fixed the issue.
I think you have to ask yourself what could have changed? Bad fuel, low fuel pressure, bad afr, bad spark or bad compression. Bad afr could be a header leak, a clogged cat, a boost leak, a bad o2 sensor or something but I can’t imagine you would see any of these problems with no CEL.
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I noticed that the Atmosphere pressure is reading low which could be a contributing cause, but there is no CEL. I started another thread regarding the location of it.
I'm not sure if I have a clogged filter. The car runs a lot worse on pump gas than E85 which tells me it's probably a fuel compensation issue. :/