I have a 1996 chevy lumina 3.1L. It keeps dropping real low in idle and stalling out. When it does this is smells really bad of gas. It was also running real rough at times. It said codes: P1200 injector control circuit fault, P0300 engine misfire, P0341CMP sensor out of range, P0401 Insufficent EGR flow. I have replaced the cam sensor, spark plugs, wires, and egr valve. The coils are all firing, and so are the injectors. It took away the roughness but still randomly drops in idle and misfires like crazy. The egr valve was even bypassed and still does the same.I dont get it. My brother has tested everything he can think of and spent two days working on it and one minute its running perfect and next its droping and stalls out. Also I forgot to mention this only started after I had replaced my intake manifold that was leaking. Any suggestions or ideas? The computer? Injector randomly staying part way open? Please help so tired of not knowing when im gonna get brokedown again.
Tuesday, February 15th, 2011 AT 3:53 AM