2001 ZX2 2.0L CEL Code 0171
Struggling with this diagnosis - lean condition on one engine bank. The engine {180,000 miles} runs fine at idle and fast and or heavy throttle exceleration, only stumbles when excelerating from dead stop or during 1/2 throttle situations{clearing a hill or cruising straight aways}.I've so far replaced upstream O2 sensor, installed new plugs and PVC, removed and cleaned IAC valve {too expensive to replace without certain knowledge its the problem}, Spark good to all cylinders - one of 4 injectors replaced recently, newer fuel filter. Did not check TPSensor, Valve cover gasket is leaking somewhat, and cleaned breather element from valve cover{surprised to see that element was completely overflowing with oil sludge}. Anybody have any suggestions, all would be appreciated
Struggling with this diagnosis - lean condition on one engine bank. The engine {180,000 miles} runs fine at idle and fast and or heavy throttle exceleration, only stumbles when excelerating from dead stop or during 1/2 throttle situations{clearing a hill or cruising straight aways}.I've so far replaced upstream O2 sensor, installed new plugs and PVC, removed and cleaned IAC valve {too expensive to replace without certain knowledge its the problem}, Spark good to all cylinders - one of 4 injectors replaced recently, newer fuel filter. Did not check TPSensor, Valve cover gasket is leaking somewhat, and cleaned breather element from valve cover{surprised to see that element was completely overflowing with oil sludge}. Anybody have any suggestions, all would be appreciated
Apr 17, 2009 at 12:07 PM