LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Mulitple Spark Opti?

Old Jun 14, 2007 | 06:41 PM
  #1  
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Fei
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Mulitple Spark Opti?

Should there be multiple sparks on a single plug? I pull #1 today since I'm having very bad idle issues and checked the plug. For each TDC of that Cylinder I get 4(maybe 5) sparks. Is this normal? Or do I have bad ICM?
Old Jun 14, 2007 | 08:54 PM
  #2  
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You don't a MSD box hooked up do you?
Old Jun 14, 2007 | 11:38 PM
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Nope sure don't.
Old Jun 15, 2007 | 03:01 PM
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no one knows this?
Old Jun 15, 2007 | 03:16 PM
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Never heard of such a thing on the stock system.
Old Jun 15, 2007 | 06:27 PM
  #6  
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Odd. I think this maybe causing my miss and bad timing. I will try swapping some of the ign parts and see if that fixes it
Old Jun 15, 2007 | 07:04 PM
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How did you test it to make sure it was actualy sparking that # of times?
Old Jun 16, 2007 | 04:43 PM
  #8  
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pull the plug and ground it and watch it fire
So changed the cap and rotor. This fixed the miss fire but it still sparks multiple times on each cylinder. A little odd but I'm ok with that. And I know for sure that there us no after market ignition on there seeing as I just pulled this setup out of my 94 and put it in my 92. I'm sure I would have found a box seeing as I rewired the whole car :-p

Last edited by Fei; Jun 16, 2007 at 04:55 PM.
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