2002 Chevy Tahoe Engine codes/adjustments

2002 CHEVROLET TAHOE
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JCP22
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Engine Mechanical problem
2002 Chevy Tahoe V8 Two Wheel Drive
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just got my car smoged. a week later engine light came on then not too long after car died. bought a code reader and its reading codes: p0171 and p0174 code book states fuel system too lean bank-1, bank-2.
is there an adjustment I can make to correct the problem?
Jun 28, 2008 at 11:00 AM
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MERLIN2021
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You may have a vacuum leak, get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs! If that doesnt do it, you may need a new idle air control valve, it's bolted to the throttlebody
Jun 28, 2008 at 11:02 AM
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