Pinging - Off-Road Forums & Discussion Groups
GM Standard IFS Trucks & SUV's All discussion of full sized IFS Trucks, SUV's to include Suburban

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post #1 of (permalink) Old 02-21-2004, 11:02 AM Thread Starter
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Ok, after that sound my tranny was making, i took it to a shop, but it stopped making the noise. WHile on the test drive, the guy said my motor was pinging pretty bad.

He suggested running some premium to see if that stops the pinging, and it did. What do i need to do now to make it not ping on regular 87?

The truck did have a full tuneup last summer, but end of the summer when i had to get it smogged, they had to reset the timing back to zero (guess it was retarded when they tuned it up). Didn't notice pinging difference before/after tuneup, but then again i didn't know that the noise i had was pinging at all, it thought it was mechanical.

So basically, i have limited knowledge of pinging, and almost zero knowledge about timing. Thanks for any suggestions!

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post #2 of (permalink) Old 02-21-2004, 08:09 PM
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Re: Pinging

if you don't trust yourself to do it, you need to have somebody check your timing. Both base and the advance. The base timing you can adjust, but the other your stuck with unless you replace your ecu.
post #3 of (permalink) Old 02-24-2004, 12:22 PM Thread Starter
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Re: Pinging

Ok, i had it checked, and it was set at zero. The guy reccomended setting it back 4˚ and giving it a try. What should i notice about how it runs now? How should this affect performance?

Maybe its a mind over matter thing, but it seems to be a little sluggish now. Anyways, i gotta run this tank of 91 out and put some 87 in to see if it solved the problem.

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