My 03 gmc envoy 4.2 L starts and runs fine but when I come to a stop at a stop sign or something it vibrates and idles real rough. The rpm's gage stays pretty much the same place. But I can put it in nuetral reverse or park and it clears right up. Or if I let of the brake and let it start to roll forward it seems to ease up some on the roughness. It has about 140,000 miles on it. Any ideas what it could be. The check engine light came on one time and it was saying that the coolant temp sensor was bad. But then the light went off and hasnt came back on. Could that have anything to do with it? Also it doent do it all the time sometimes it does it worse than others, and sometimes it doesnt even do it at all? I HAVE NO IDEA WERE TO START
have the same problem?
Tuesday, November 30th, 2010 AT 8:59 PM