C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Testing a coil pack ..

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Old Jan 17, 2002 | 03:57 AM
  #1  
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GlockLT4
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Default Testing a coil pack ..

How do you test a coil pack? Just buy a new one and see if it helps?
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Old Jan 17, 2002 | 04:51 AM
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moffitt
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Default Re: Testing a coil pack .. (Glock'94)

I just ohm them out. If there are any questions, I swap the coil with a working one to see if the dead one moves with the swap. If all are dead it's usually the module, cam or crank sensor (I have run across very few ECM failures). The sensors can also be checked with an ohmeter. After 100K I consider them highly suspect. They can be a pain!


[Modified by moffitt, 2:52 AM 1/17/2002]
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Old Jan 17, 2002 | 11:28 AM
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Default Re: Testing a coil pack .. (Glock'94)

Raise the hood of the car. Take the coil wire loose and hang it above the intake. Place some tuna in the end of the wire & wait for the neighbors #@%@&$#" cat to come over & eat the tuna. When he bites the tuna hit the switch. If the cat jumps off the engine then the coil is bad, if he gets knocked off the engine it's good. If he lays on the ground & doesn't move it's real good !!! :D

Neal



[Modified by Arisa, 10:29 AM 1/17/2002]
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Old Jan 17, 2002 | 07:43 PM
  #4  
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From: Cincinnati, Oh USA
Default Re: Testing a coil pack .. (Glock'94)

Put a .05 mfd capacitor across the primary wires (yellow and red). You can use a capacitor from an old point contact distributor. Clip a test lead on either of the primary leads and rest the other end about a half inch from the high voltage terminal and pulse the primary with 12 volts (from your car battery is ok). You should get a nice blue white snappy spark every time you break the 12 volt connection to the primary wires.
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Old Jan 17, 2002 | 07:57 PM
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Default Re: Testing a coil pack .. (jfb)

Thanks guys!
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Old Jan 19, 2002 | 07:18 AM
  #6  
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GlockLT4
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From: Dallas TX
Default Re: Testing a coil pack .. (Arisa)

Raise the hood of the car. Take the coil wire loose and hang it above the intake. Place some tuna in the end of the wire & wait for the neighbors #@%@&$#" cat to come over & eat the tuna. When he bites the tuna hit the switch. If the cat jumps off the engine then the coil is bad, if he gets knocked off the engine it's good. If he lays on the ground & doesn't move it's real good !!! :D

Neal

[Modified by Arisa, 10:29 AM 1/17/2002]
:lol: :lol: :lol: :lol:
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Old Jan 19, 2002 | 11:31 AM
  #7  
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frank moran
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From: woodstock, Ga
Default Re: Testing a coil pack .. (Arisa)

what brand of Tuna do you recommend, it's all in the details. I like your idea.
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