PO171 and PO174 for 1998 GMC Jimmy 4.3L help

Tiny
ROYCAR71
  • MEMBER

LOL, I will do first thing in morning thanks.

Was this
answer
helpful?
Yes
No
Sunday, September 30th, 2012 AT 4:29 AM
Tiny
SATURNTECH9
  • EXPERT
  • 30,281 POSTS

Your welcome the rum flavored ones are my favorites use a really bright flash light to look for the smoke.

Was this
answer
helpful?
Yes
No
Sunday, September 30th, 2012 AT 4:36 AM
Tiny
ROYCAR71
  • MEMBER

I did smoke test with cigar. I did find that upper air duct that goes over throttle seemed to have comprised seal/gasket so I replaced it. Car drives good not one hesitation or stumbled, but still get po171 and po174 off and on; with rough idle when CEL comes on. My question, could it be a bad fuel injector. Thanks.

Was this
answer
helpful?
Yes
No
Saturday, October 13th, 2012 AT 10:21 PM
Tiny
SATURNTECH9
  • EXPERT
  • 30,281 POSTS

I have seen when you replace the mass air flow sensors on those with after market ones still having those lean codes. You could have a vacuum leak somewhere else also.

Was this
answer
helpful?
Yes
No
Sunday, October 14th, 2012 AT 1:48 AM

Please login or register to post a reply.

Other P0174 Questions