got the missing down to one cylinder - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-02-2011, 09:02 PM   #1
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Default got the missing down to one cylinder

i decided against the fuel pump as the car was running way to good off idle and i could start it with a flick of a key so i went with the plugs first. put delco double plats in it today and man what a difference. the car pulls harder that it has in a while. i accidentaly did a burnout leaving my house today. but it still misses on one cylinder and on occasion 2 so its leading me to believe a coil is bad. anything else you guys can think of.
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Old 10-03-2011, 09:50 AM   #2
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Scan it.
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Old 10-03-2011, 09:54 AM   #3
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Check it..
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Old 10-03-2011, 11:18 AM   #4
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Test the coils. however, even when they test good they can still miss. What code are you getting? Are both cylinders missing on the same coil?
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Old 10-03-2011, 04:52 PM   #5
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My car shows no codes I already scanned it. My car seems to have a problem showing codes it hasn't shown one since last year and I have had a ton of problems since then last code I pulled was a base cluster failure so idk if that could be why
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Old 10-04-2011, 04:09 PM   #6
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well i started pulling plug wires off and when i got to 2 noticed the spark was less and intermittent so i repalced the coil and it still misses so looks like a ignition control modual now grrrrrrrrr
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Old 10-04-2011, 04:35 PM   #7
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Yep. I always keep a spare around. You can test and test a ICM and it will say good. The problem is, any ICM test will tell you it'* bad. But does not tell you it IS good.
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Old 10-04-2011, 06:10 PM   #8
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just got back from autozone. icm test said bad and they also pointed out to me that the thermal patch on it was missing so it probably had overheated
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Old 10-04-2011, 06:13 PM   #9
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ordering one on rockauto now airtex is having a closeout at $53
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Old 10-04-2011, 06:19 PM   #10
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Lets hope this fixes the problem.
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