p0171
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1999 Expy 5.4L v8 throwing multiple codes, help please!!
Hi guys! I'll try to keep this post short, but I want to make sure I cover everything that's happening with my Expy. Ok so I have a 1999 Expy 5.4L triton v8 with around 260,*** miles on it. Had it almost a year now, and everything has been smooth sailing until about a month or so ago. The start...- Witchy_Libra_33
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- front end vibration low oil pressure light p0113 p0171 p0174 p0303 p0307 p0308 p1400 ses light
- Replies: 9
- Forum: 1st Gen Ford Expedition Engine & Performance
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P0171 Bank 1 Too Lean - Decatted O2 Sensors?
Hey everyone- A little backstory: my truck is decatted (has the pre-cats still) and has the rear O2 sensors mounted in spark plug defoulers to fool them. I got a lean condition code on the way back from work today, and was wondering if this could be the cause. If I recall correctly, the rear...- Kevmobile
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- diagnoses p0171
- Replies: 1
- Forum: 1st Gen Ford Expedition Engine & Performance
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J
1997 4.6L issues HELP with ideas please
I’ve had my truck for over 10 years and have never had an issue. But in the last month has been running rough. To the point of almost stalling and shudders sometimes. Also noticed a whistle noise that’s new. Scanned it and they said EGR Valve bought a new one and changed it. Same issue no change...- joshNphoenix
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- 1997 4.6l p0135 p0155 p0171 p0174 p0301 p0303 shuddering
- Replies: 14
- Forum: 1st Gen Ford Expedition Engine & Performance
