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coil problem?

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Old 12-19-2013, 06:18 PM
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Car: 89 Black GTA
Engine: 'close to' stock 5.7 but trending>>
Transmission: 700
Axle/Gears: 3.27
coil problem?

no start this morning - cranks, but no start. This afternoon i put a spark plug light between the coil and dist. at first, cranking produced no light. but after about 10 seconds, the light started showing up and car immediately started.

Help! what does this indicate - bad ICM, coil, wires somewhere, ????
Old 12-20-2013, 06:58 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: coil problem?

You might want to see with a noid light if you have injector pulse. Or even a tach signal . If you do chances are your icm is good and the issue is in the jumper going from the icm to the coil , high resistance in the coil wire, cap terminal or carbon button.
Old 12-20-2013, 07:02 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: coil problem?

You might want to check the ohm resistance of the primary and secondary coil windings on your ignition coil.
Old 12-20-2013, 10:39 PM
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Re: coil problem?

Originally Posted by EvelBist
no start this morning - cranks, but no start.
http://easyautodiagnostics.com/gm_ic...n_module_1.php
Old 12-21-2013, 07:34 PM
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Car: 89 Black GTA
Engine: 'close to' stock 5.7 but trending>>
Transmission: 700
Axle/Gears: 3.27
Re: coil problem?

for the record, the "new" delco coil had low resitance in the secondary. got it from rockauto, so maybe it was on the shelf a long time but there really is no excuse for that. i put back the accel coil that was there before i "went back to stock" and havent had any problems for several days.

'if it aint broke ... ' o well.
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