2002 Pontiac Firebird Did not receive an answer the first t

2002 PONTIAC FIREBIRD
77,000 MILES • V8 • 2WD • AUTOMATIC
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VOICES204
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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?
Sep 19, 2009 at 11:19 AM
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RASMATAZ
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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-
Sep 19, 2009 at 11:50 AM
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VOICES204
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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

Sep 19, 2009 at 2:13 PM
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RASMATAZ
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The FPR is attached to the fuel rail it looks like this


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

Sep 20, 2009 at 2:51 AM