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Rough idle? P0171, P0174? Here's what you need to check first!!!
Glad to see this thread revived! This just started happening to my 2003 4.6L Expedition. Runs fine when cold. Once warm, the idle drops and stays low. If I give it gas it will die once I take my foot off the pedal. So far it has only died at stop lights and slow turns, or when sitting in...- Circa1981
- Post #48
- Forum: 1st Gen Ford Expedition Engine & Performance
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