1996 Ford Ranger P171 code

Tiny
JUGGERNAULT
  • MEMBER
  • 1996 FORD RANGER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 111,000 MILES
I have a 96 ford ranger that I had scanned because it wouldn't idle for more than a few mins with out stalling. When scanned I got the p171 code(too lean on bank #1) Had fuel pressure tested and it was only 30psi in the on postion and 32psi when running. Pulled the vacuum hose to fuel regualtor pressure when to 40 psi, determined that fuel pump was failing, replaced is now have 40psi fuel pressure but truck still won't idle. And still recieving same engine fault codes. I believe I have a vacuum leak and I've isolated it. My problem is I can't find and correct pics of my engine. Everything I find has the egr connected to the manifold where as mine is alongside the motor with a pipe leading from egr into the manifold (which is were leak is isolated) I'm trying to find out how the pipe connects to the mainfold what do I have to replace to resolve my problem.
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Sunday, January 13th, 2008 AT 10:35 AM

3 Replies

Tiny
MERLIN2021
  • EXPERT
Check the MAF the IAT and ECT for propper function, you need input from all three for the PCM to adjust fuel air mixture propplery during closed loop operation. Not to mention the 02's! Do you have the 3.0 or 4.0?
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Sunday, January 13th, 2008 AT 10:51 AM
Tiny
JUGGERNAULT
  • MEMBER
It's a 4.0L. I will check what u mentioned above. Thanks for the input.
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Sunday, January 13th, 2008 AT 4:48 PM
Tiny
FLEXY5
  • MEMBER
If you don't mind me asking, where do you believe the vacuum leak is?
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Sunday, January 13th, 2008 AT 7:40 PM

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