Mechanics

CHEVY IDLE PROBLEMS

2002 Chevrolet Tahoe

Engine problem
2002 Chevy Tahoe V8 Four Wheel Drive Automatic 65000 miles

WHEN FIRST START ENGINES IDLE AROUND 5 THEN STARTS IDLES UP AND DOWN, AFTER WARMS UP SEEMS TO IDLE FINE TAHOE RUNS GREAT NO MISS NO STUMBLES I DO HERE HISS AROUND PCV PULL OUT PCV FROM HOSE ENGINES RUNS REALLY ROUGH LEAVE PCV IN HOSE PLACE FINGER ON BOTTOM PCV FEEL BALL JUMP UP INSIDE PCV. CHANGED FUEL FILTER & AIR FILTER PUT IN GOOD LUCAS FUEL TREATMENT. ONCE A WEEK CHECK ENINE LIGHT COMES ON THEN GOES OFF A DAY OR SO LATER AUTOZONE CHECK IT SAID IT WAS O2 SENSOR BANK 1 AND BANK 2 ANY IDES THANKS
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Tahoe4x4
December 10, 2007.



Check your intake manifold gaskets for a vacuum leak when you first start the engine. This will cause a erratic idle and P0171 and P0174 codes.

Dennyp
Dec 16, 2007.