Question about 1999 GMC Yukon
Air conditioning leaks
This system has a h t 6 ac compressor that is most likely the problem,replacing it is the best thing to do if the leak is often,and this ac compressor is at the top of the line for problems with leaking,stop leak will not work,and if the leak does not occur very often,just recharge the system,but if it is often,replace the ac compressor and it`s components.If this was at all helpful,please rate,and thank you,and buy the way ,it is a 99.9 percent chance ,this is the problem,
Posted on Jul 18, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
MAF: A Mass Air Flow (MAF) sensor output that causes the PCM to sense a lower than normal air flow will cause a lean condition.
Air Induction System: Air leaks into the induction system which bypass the MAF sensor will cause a lean condition. Check for disconnected or damaged vacuum hoses, incorrectly installed or faulty crankcase ventilation valve, or for vacuum leaks at the throttle body, EGR valve, and intake manifold mounting surfaces.
Fuel Pressure: Perform a fuel system pressure test. A faulty fuel pump, plugged filter, or faulty fuel system pressure regulator will contribute to a lean condition.
Injector(s): Perform injector coil/balance test to locate faulty injector(s) contributing to a lean or flooding condition. In addition to the above test, check the condition of the injector O rings.
EGR: Check for leaking valve, adapter, or feed pipes which will contribute to a lean condition or excessive EGR flow.
Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
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