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**kiasis** · 06-05-2008, 11:53 PM

Are you also checking for the source of the ping? You're getting an improper burn for some reason and may be running too high cylinder compression due to carbon build-up, slightly off timing, or something else causing the A/F mixture to go a bit off. I'd still recommend an EFI system cleaning. Personally, I've only had consistently good, measurable results from Sea Foam and think most other off-the-shelf treatments junk. But to each their own. Sea Foam does a great job of burning the excess carbon, which in a 100k mile engine could be enough to add 5-10 psi compression more than is healthy for the longevity of the engine. Just a thought...

06-05-2008, 11:53 PM	#4 (permalink)
kiasis Location: Sacramento, CA Posts: 57 Join Date: Aug 2007 Last On: 10-11-2008 02:12 PM Vehicle: 88GTS	Re: What Octane rating should i use in my 86 celica GTS? Are you also checking for the source of the ping? You're getting an improper burn for some reason and may be running too high cylinder compression due to carbon build-up, slightly off timing, or something else causing the A/F mixture to go a bit off. I'd still recommend an EFI system cleaning. Personally, I've only had consistently good, measurable results from Sea Foam and think most other off-the-shelf treatments junk. But to each their own. Sea Foam does a great job of burning the excess carbon, which in a 100k mile engine could be enough to add 5-10 psi compression more than is healthy for the longevity of the engine. Just a thought...