2003 GMC C1500 fuel pressure

2003 GMC C1500
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GARAGEFAN
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Engine Performance problem
2003 GMC C1500 V8 Two Wheel Drive Automatic

While running a fuel pressure test on a 2003 GMC vortec v8 the idle readings were in specs but not at the minimum and once under a load it was higher than maximum specs..........what could be the problem?..........or is it just factory settings?
Feb 24, 2010 at 3:33 PM
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RASMATAZ
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What was the idle and under load fuel pressure readings

The pressure should be 55-62 psi

Your possibilities could be the fuel pressure regulator or a restricted fuel return line
Feb 24, 2010 at 4:01 PM