Question about 2004 Chevrolet Impala

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My mechanic change spark plugs in 2004 chevy impala ss indy edition now there is a miss in one of the cylinders i put bosch platinum 4s in it do ineed to reset computer or something to get miss out thanks

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I had a similar situation occur. Pulled my hair out trying to figure it out. Just routine maintenance. Car was working well before and had a miss after. Turned out the service tech had some difficulty removing one of the plug wires and the electrical connection deep in the plug cap was severed.
I was able to determine which cylinder was missing by disconnecting individually one at a time until one made no difference in operation. I then swapped this wire with another and the symptom persisted only on a different cylinder. A set of replacement wires solved everything.
Back in the day I would have suggested he could have reinstalled the wires out of order but in modern card the wire dressing makes that very difficult to do.

Posted on Nov 08, 2010

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