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2001 Kia Spectra misfiring on cylinder number one Plugs and wires new ideas on what to check next?
Wiki User
∙ 17y ago
I suggest you run a COMPRESSION TEST on all cylinders. It has been so long, I cannot describe how to interpret the results, but basically, analysis of the test results, both for the suspect cylinder and the others, and the relationship of the differences can tell you a great deal about the condition of the rings and valves. IF the compression in the SUSPECT cylinder is outside of the range of the others, that could be the cause of your miss. A "miss," or "missfire" can result from several causes, LOW COMPRESSION being only one. Low compression can be caused by worn compression rings, improperly seating [leaking] valves, a leaking head gasket, a cracked head or cylinder wall, and probably other causes I've overlooked. Instructions for performing a compression test can be found in basic automotive service manuals, usually available at most local libraries [loan] and/or auto parts supply stores [buy]. There are a few different compression testers available at your local auto parts supply. They all operate in the same manner, some are just designed to be more convienent to use, and thus usually cost more. Before buying any tools or test equipment, get the manual[s] which describe the process, study them until you fully understand the procedure[s], and then, obtain a compression test set. It is possible that some auto parts houses MAY LOAN you a compression tester. If not, then buy the best you can afford.
Wiki User
∙ 17y ago
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