lexxus Posted November 19, 2006 Share Posted November 19, 2006 My girlfriend's 94 SC300 pings like hell. I accused her of using regular, and she says she always uses premium. Must be something wrong. Any ideas? I don't mean a loud knock either. It's not a bearing. it's definitely a ping like bad gas, and it's been that way for a while now... Quote Link to comment Share on other sites More sharing options...
skipper Posted November 19, 2006 Share Posted November 19, 2006 My girlfriend's 94 SC300 pings like hell. I accused her of using regular, and she says she always uses premium. Must be something wrong. Any ideas? I don't mean a loud knock either. It's not a bearing. it's definitely a ping like bad gas, and it's been that way for a while now... GENERALLY, when an engine "pings" it has a great deal to do with the timing of the spark -detonation process to the position of the pistons. I'm not fasmiliar enough with the model, but sounds to me like the timing is set too fast. !Removed! the timing by turning the distributor back. I found with a german car I formerly owned someone had the overhead cam belt off- then didn't get everything lined up correctly- talk about a ping- thought the entire valve train was going to expose it's self. See if the distributor is loose? Quote Link to comment Share on other sites More sharing options...
UCF3 Posted November 19, 2006 Share Posted November 19, 2006 Also try using some Prestone Engine Clean when you add more fuel. When you're changing your oil i'd add some Restore; it may take the pinging out. You could probably get this done now. Quote Link to comment Share on other sites More sharing options...
Alex-us Posted November 20, 2006 Share Posted November 20, 2006 Clean the air filter and check/clean the MAF sensor. Either of these can cause a lean condition which results in pinging. :) Quote Link to comment Share on other sites More sharing options...
bartkat Posted November 20, 2006 Share Posted November 20, 2006 Carbon buildup can cause pre-ignition knock. Quote Link to comment Share on other sites More sharing options...
anthonyiez Posted November 24, 2006 Share Posted November 24, 2006 Carbon buildup can cause pre-ignition knock. bingo...just what i was going to say on an older car. Quote Link to comment Share on other sites More sharing options...
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