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2002 Ford F-150 codes P1131 and P1151

Tiny
JMURPH216
  • MEMBER
  • 2002 FORD F-150
2002 Ford F-150 V8 Two Wheel Drive Automatic

we changed plugs and one coil on my f150 cause of cyl 8 misfire. After we changed everything and got it together it won't idlee and it misses but when driving down the road it runs good. It showing codes p1131 and p1151 can you help please?
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Saturday, October 2nd, 2010 AT 1:56 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Both codes identify a lean fuel mixture. To get them, there is most likely unmetered air getting into the engine. Have you checked for vacuum leaks? Maybe you bumped one when working on it. Also, check the EGR valve to make sure isn't sticking open.

Let me know what you find.
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Sunday, October 3rd, 2010 AT 9:28 PM

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