Question about 1985 Chevrolet Cavalier

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One cylinder is not firing, what can cause this? it started all of a sudden, no warning. we have changed the plugs and plug wires but the one cylinder is still dead. what could be the cause of this?

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2 things to check. With the engine running, pull 1 plug wire off each cylinder, ,,, 1 by 1 and notice if the engine changes. If you pull 1 off and it does NOT change,, then shut off the engine. and do a compression check. You can also get one of you old plugs and hook it up to the wire while grounding it to the valve coever to see if you are getting spark from the coil/distributor to that cylinder. if not, then you have located your problem.

Posted on Feb 02, 2010

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When did the problem start? Before you changed the wires and plugs? Or did it start, AFTER you changed the wires and plugs? Did the problem remain the same BEFORE & AFTER you made the changes?

1 - If the TOY ran fair to Okay before you did the work, then you may have done something wrong when you made the cahages. Check for correct plugs and firing order. Check for cross wiring. With engine runing pull one plug wire off each plug one at a time. Each pulled plug wire will slow down the engine. When you pull a plug wire that doesn't react and does not make any change ON or OFF that cylinder Plug.
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