1999 Chevy Venture Engine Problems? - Chevy Spark Forum : Chevrolet Spark Forums
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post #1 of 1 Old 10-24-2016, 03:40 AM Thread Starter
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1999 Chevy Venture Engine Problems?

They own a 1999 Chevy Venture with 142k miles, The engine knocks real hard at random times. They have replaced 3 spark plugs and wires (They cannot reach the back 3 without taking out the engine). When they use a little higher grade gasoline it seems to run better MaxiSYS MS906. Do you think a product like Zmax, or Sea Foam fix it? They think that they are only running on 5 cyl.

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