Auto Parts and Repairs
Spark Plugs and Wires
Chevy Silverado

What causes a spark ping or knock at highway speed on your 1995 Chevy silverado?


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2008-05-22 21:43:29
2008-05-22 21:43:29

the link below is pretty descriptive and in detail...

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Pinging is caused by pre-detonation. This is fuel burning prior to the plug firing. Pre-detonation can do some serious damage to your engine, so don't ignore this. You can of course move up to a higher octane fuel to help, but this can be expensive. I suggest you have the timing checked first. Also look for any vacuum leaks. If this is OK, then you need something to help remove carbon deposits which can cause pinging. I recommend a product called Seafoam. It is sold at most Auto Parts stores, Marine, and Lawn Mower shops. Use it according to the directions on the can. try using a higher octane grade of fuel.


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