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Old 12-29-2005, 12:10   #1
Kentuckian
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2002 Taurus problem.

My wife's 2002 Taurus has been difficult to start on cold mornings lately, and with 72,000 miles on it I decided to change out the spark plugs.

The factory gap setting is .044, and all the gaps had opened up to about .065.

I changed them out and took the car out for a drive, and under heavy acceleration it would begin stumbling and had no power. The check engine light came on, so I took it to Advance Auto Parts where I bought the plugs. They read the code, and it said "cylinder 1 misfire". I figured the plug must be bad, so I bought another plug and changed it out, but it didn't fix the problem. I then thought that perhaps the connector in the plug wire had separated when I replaced the plug, so I bought a set of wires and replaced the wire for #1 cylinder. That seemed to fix the problem initially, but on the way home it started acting up again.

The only thing left, as far as I can tell, is the coil itself. Is it possible that the new plugs caused the coil to go bad? I swapped out the plugs one at a time, so I know the wires aren't crossed.

Any ideas?
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Old 12-30-2005, 10:57   #2
streeter69
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Pick up some seafoam or chevron techtrolin (something like that spelling) put one in the tank and run one thru the vacuum system. I have found alot of problems with carbon buildup causing missfire codes even after doing a tuneup. You may also want to do a compression test.
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Old 12-30-2005, 15:05   #3
Kentuckian
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The code reader at Advance Auto Parts must be screwy, because I found out through a little trial and error that the problem was a bad spark plug in cylinder #2, rather than #1.

;g

At any rate....it's fixed.
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