My SL is fine when it is cold, but when it is warm it pings almost constantly, especially in higher RPMs. The previous owner changed the thermostat to a lower setting 170, I think. I also did not have any (less than piss warm) heat over the winter. I was wondering if these 2 problems are related. I do not have any service engine lights on.
Thanks for everyone's help. The car does almost have 150,000 miles. Every hear of seafoam and will it be a fix or make things worse. I didn't have any problems since it was a cooler temp outside. I don't get it! BTW The cooling fan comes on when I turn on the A/C.
I would use GM's Top Engine Clearer myself. I think I posted a walkthrough for it here in the past. Look in google groups archives. Saturnfans has a few walkthroughs and discussions for seafoam IIRC.
If I were you I might start by installing a brass ECT sensor, if it has a plastic tipped ECT sensor, and then remove and clean the EGR and passages. If it looks bad then the engine should probably be decarbonized. (also be sure you have an air damn and an unobstructed radiator...)
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