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1997 Ford F-250 running rich at idle

Tiny
LARRY383
  • MEMBER
  • 1997 FORD F-250
I have a f250 with a 351 and I plug it into a scanner and it sed under 02 senser that it was rich I had the motor at idle, what is the main reson that would make it say it is rich? What part is most likley the part that needs to be changed? Thanks for any info
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Monday, October 29th, 2007 AT 6:00 PM

2 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Check the o2 sensor first. If nothing check the MAF and Coolant temp sending unit.
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Monday, October 29th, 2007 AT 7:16 PM
Tiny
BURTBOSTWICK
  • MEMBER
  • 2 POSTS
Mine was sucking gas right threw the fuel pressure regulater
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Sunday, December 16th, 2007 AT 8:48 AM

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