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Truck is hunting and stalls.

Tiny
JEREMYG1970
  • MEMBER
  • 1997 FORD RANGER
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 177,514 MILES
The truck seems to hunt when idling. But does it more when in drive with my foot on the brake. It eventually stalls. Replaced egr valve, plugs and bank 1 sensor 2 sensor. Have codes P0171, P0141, P0174, P0136. I cannot figure it out.
Wednesday, June 1st, 2016 AT 5:33 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try cleaning throttle plate on both sides with choke cleaner and iac hole. then check fuel pressure with a gauge.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

The 171 and 74 are lean codes so it could be an injector as well, but do this first. it also can be a vacuum leak so check all of that and if everything is good then get back to us.
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Wednesday, June 1st, 2016 AT 6:38 AM

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