5.4L running like crap!! HELP
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5.4L running like crap!! HELP
My 2000 Ford F250 with a 5.4L gas engine is running like crap after changing out the fuel filter. It starts, idles at about 800 rpm. Runs and drives but has no power, it actually sounds like it has an exhaust leak when I hit the gas.... pulled codes off it. P0171, P0174 and P1131. Looked them up but so many could be's. Would appreciate any help. Thanks
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Tank is full, Yes, filter in the right way, arrow pointing towards the motor. Those three codes point to the engine running lean due to a possible vacuum leak somewhere???? Cleaned MAF sensor and IAC valve too.
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Is it leaking fuel by the filter now? I'd reinstall the filter, and check for leaks. Maybe it's sucking air, or maybe the filter isn't right. Seems like if you didn't have the problem before, then you should get a different filter and try that first.
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Worked on it this morning, erased the codes, took it for a drive. Still running crappy, now it's only coming up with one code, P1131, HO2S sensor trying to correct for an over-lean condition. That code means that it's a bad sensor???
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More Turbo
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Well you're running lean according to the codes. Have you checked your fuel pressure? Possible the fuel pump is dying. Lots of people complain of no power when they start to die. Also, I can't remember if the older 5.4s have any valve timing adjustment going on, but any noise you're hearing may be that if they do.
Get someone to test your fuel pressure IMO.
Get someone to test your fuel pressure IMO.
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My 2000 Ford F250 with a 5.4L gas engine is running like crap after changing out the fuel filter. It starts, idles at about 800 rpm. Runs and drives but has no power, it actually sounds like it has an exhaust leak when I hit the gas.... pulled codes off it. P0171, P0174 and P1131. Looked them up but so many could be's. Would appreciate any help. Thanks
why did you change the fuel filter?
how many miles on the engine?
what about the air filter? is the MAF clean?
definitely check the fuel pressure
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I changed it thinking it would help it idle better
224k miles
New air cleaner and MAF was cleaned.
More Turbo
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If it were plugs or coils you'd be getting misfire codes most likely.
Did he only test the fuel pressure while idling? I've heard of people who get fair pressure while sitting but once they get rolling and using the fuel that a failing pump can't maintain pressure. Not sure how often or true that is.
Did he only test the fuel pressure while idling? I've heard of people who get fair pressure while sitting but once they get rolling and using the fuel that a failing pump can't maintain pressure. Not sure how often or true that is.