Mechanics

CHEVROLET MALIBU CHECK ENGINE LIGHT PROBLEM

2003 Chevrolet Malibu • 122,000 miles

I have a problem just changed my heads and injection gaskets 3 months ago. Now my check engine light is one. It was blinking now it stays on. But now its reading a p0302 code and I replaced my spark plug to that cylinder wires. But Im still getting a knock and misfire. What can be the problem?
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April 8, 2013.



A knock? Please explain

start with compression test.

Roy



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