Question about 1987 Chevrolet Cavalier 4 Door

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I have a 1998 z24 cavalier. Under load in higher gears it has a bad misfire. It can be corrected if i downshift. It only happens when the motor is under heavy load. It has no dtc's. I pulled the plugs. they are ok. i ran a fuel injection cleaning service. i cleanded the throttle plate. The only thing left is the coil on top of the valve cover. The coil is what i initially thought to be the problem but since i am a mechanic i just checked and did the cheap stuff first before spending the money on a coil. Is this a common or somewhat common problem on the z24?

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My 87 z24 with a v6 had the same proplem.Try plug wires.I slamed in new plug wired and walaa problem solved

Posted on Nov 13, 2008

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