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2002 Pontiac Firebird Did not receive an answer the first t

Tiny
VOICES204
  • MEMBER
  • 2002 PONTIAC FIREBIRD
  • V8
  • 2WD
  • AUTOMATIC
  • 77,000 MILES
P0171 and P0174 codes come up on the scanner with no codes for a cause. The fuel pressure is a little low but the car runs fine. Once in awhile the idle is a little rough. The O2 sensors are new and the MAF is new. I am thinking the fuel pressure regulator. Any thoughts other than that?
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Saturday, September 19th, 2009 AT 11:19 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
I gave you something to work with earlier-Did you check it all for the lean condition

You can verify the FPR when you disconnect the vac hose the pressure shoud increase 8-19psi if not its not doing its job alo check for fuel on the vac hose if there's any its ruptured-

Als try cleaning out the idle air control valve-
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Saturday, September 19th, 2009 AT 11:50 AM
Tiny
VOICES204
  • MEMBER
  • 3 POSTS
Well after a very frustrating search for the FPR I learned it is in the fuel tank. I am back to square one because I am still getting the P0171 and P0174 codes. I cleaned the ICV. It made a little difference but did not cure the problem. There is a crossover pipe in the fuel rail see picture and tell me what that does, I suspect that is some type of regulator.


https://www.2carpros.com/forum/automotive_pictures/410658_DSC00792_2.jpg

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Saturday, September 19th, 2009 AT 2:13 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The FPR is attached to the fuel rail it looks like this


https://www.2carpros.com/forum/automotive_pictures/12900_FPR_1.jpg

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Sunday, September 20th, 2009 AT 2:51 AM

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