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karr95 · 06-22-2007, 09:33 AM

OK, my 91 GTA was idleing a little rough and I noticed the last time I was driving it that I didn't hear the fans coming on. So I brought the car to GM and they fixed the fans (some faulty switch) and they are telling me that my rough idle is being caused by my spark plugs.

Per the recommendations on this board, I went with standard AC Delco Plugs. They are telling me that they pulled 2 plugs and both of them were gapped at about .010. I know for a fact that I gapped them at .035. Is it possible that the gap changed or are they blowing smoke up my a$$? They wanted $250 to pull the plugs and re-gap them so I politely thanked them for helping me and requested they put the car back together.

What do you guys think?

06-22-2007, 09:33 AM	#1
karr95 Join Date: Dec 2004 Posts: 224 iTrader: (1)	Spark Plug Issue OK, my 91 GTA was idleing a little rough and I noticed the last time I was driving it that I didn't hear the fans coming on. So I brought the car to GM and they fixed the fans (some faulty switch) and they are telling me that my rough idle is being caused by my spark plugs. Per the recommendations on this board, I went with standard AC Delco Plugs. They are telling me that they pulled 2 plugs and both of them were gapped at about .010. I know for a fact that I gapped them at .035. Is it possible that the gap changed or are they blowing smoke up my a$$? They wanted $250 to pull the plugs and re-gap them so I politely thanked them for helping me and requested they put the car back together. What do you guys think? __________________ 1989 Formula - 305TBI/700r4