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07/05/2021 8:05 pm
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I have a question, my 2005 ford f150 with the 5.4 3 valve is idling a little rough. I replaced the air filter and cleaned out the intake and throttle body. There is no check engine light and the RPMs don't jump up and down. Once you are going down the road it runs fine. There is no gas around the fuel pressure regulator nor do I smell any. It has 159,000 miles and the timing chain and phasers have been replaced. Any idea what else I need to check? Thanks in advance
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07/05/2021 8:41 pm
Did you replace the idle air control valve too?
