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Rough idle? P0171, P0174? Here's what you need to check first!!!
hey just had these codes pop up on my 2000 Expy XLT. I'm going to look into the vaccum leak. What i am concerned with is a noise. It sounds like a "rattle" only when its running. You can hear the "rattle" cease when you shut the motor off. the noise is around the r/s (pass) valve cover...- McNally
- Post #44
- Forum: 1st Gen Ford Expedition Engine & Performance
