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Question for Coils.

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Old 05-17-2009, 01:11 PM
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Question for Coils.

How can i see if they are in good condition or not? Or if any of them is messed up?
Old 05-17-2009, 10:49 PM
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DIY on testing OEM coils
Old 05-17-2009, 11:19 PM
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No need to test them.

when you get high rpm misfires so constant that even changing plugs dont help, its time to replace them.

their life range from 5K miles to 35K. depends on your luck. im dead serious.
Old 05-18-2009, 07:48 AM
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Also I notice my idle would jump around as the coils life depleted. Once 4 new coils were on it sat solid.
Old 05-18-2009, 09:35 PM
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thats exactly the problem i am having. RPM keeps jumping around from 1.2k to 7.. sometimes 5 nd back up. i read that thread and i don't really understand how to see if they are good or not.
Old 05-18-2009, 11:44 PM
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unless ur coils are garbage and/or plugs are all bad, no way your idle would dip below 700 rpm.

Its better to check your engine.
Old 05-18-2009, 11:48 PM
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Its fine when I'm at normal idle. I turn on the AC during Idle and it just drops to 500.
Old 05-19-2009, 12:16 AM
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Originally Posted by turbovtec
Its fine when I'm at normal idle. I turn on the AC during Idle and it just drops to 500.
Check your TB.
Old 05-19-2009, 01:40 PM
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yeah TB and prob would not hurt to do coils if it's been awhiel also!
Old 05-19-2009, 06:10 PM
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almost 30k miles.. whats a TB? sorry guys I don't know this stuff.
Old 05-19-2009, 10:41 PM
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Throttle Body

Last edited by nycgps; 05-19-2009 at 10:54 PM.
Old 05-19-2009, 10:50 PM
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Originally Posted by nycgps
Check your TB.
So how does one check the "flip thang"?
Old 05-19-2009, 10:57 PM
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Originally Posted by rx8cited
So how does one check the "flip thang"?
You need a computer, and a program support the proper data logging.

or do a simple test.

hold your clutch down, Rev ur car like there is no tomorrow and let go, usually, the rpm would "stay" at around 1100+/- rpm for maybe 2-3 seconds before your idle goes to 810. but if it doesnt, its bad.
Old 05-19-2009, 11:16 PM
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Originally Posted by nycgps
You need a computer, and a program support the proper data logging.

or do a simple test.

hold your clutch down, Rev ur car like there is no tomorrow and let go, usually, the rpm would "stay" at around 1100+/- rpm for maybe 2-3 seconds before your idle goes to 810. but if it doesnt, its bad.
I did the simple test a few days ago and it passed. Does the clutch really have to be in if the shifter's in neutral?

If the test fails, what is one supposed to do to fix it?
Old 05-19-2009, 11:21 PM
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Originally Posted by rx8cited
I did the simple test a few days ago and it passed.
Thats good to know.

Does the clutch really have to be in if the shifter's in neutral?
Yes sir.

If the test fails, what is one supposed to do to fix it?
Replace it, I think it cost like 3-400 bux ?

Last edited by nycgps; 05-19-2009 at 11:25 PM.
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