Question about 1990 Chevrolet Cavalier

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First piston not working, pick up on coil an runs fine

Runs ruff on only 3 pistons, 1st piston works some times win i play with the coil, i replayst the old coil, the two prongs that come out are not loose or bent,

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Timing chain/belt has jumped.

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My 95 buick reagal is running real ruff. One day I drove it to work with no issues and when I got off I started it to go home and it was real ruff. I almost had it floored to get on the high way. I checked...

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