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nugget
New User
Jun 30, 2013, 5:59 PM
Post #1 of 4
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1996 gmc no spark
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1996 gmc 5.7 turns over but no spark. ICM tested OK, replaced coil, replaced CPS, power to ICM, but still no spark ??????
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Discretesignals
Ultimate Carjunky
/ Moderator
Jun 30, 2013, 6:17 PM
Post #2 of 4
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Re: 1996 gmc no spark
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Where are you checking for spark at? Coil or plugs? Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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nugget
New User
Jun 30, 2013, 6:29 PM
Post #3 of 4
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Re: 1996 gmc no spark
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both
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Discretesignals
Ultimate Carjunky
/ Moderator
Jun 30, 2013, 6:52 PM
Post #4 of 4
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Re: 1996 gmc no spark
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Trouble codes stored in the PCM? Do you have access to a scan tool that can read data stream information? If so, you can look at the RPM value while cranking to see if it shows RPM speed. If you have RPM showing, then you could do a ignition module bypass test to see if you can get the coil to fire. That would eliminate igniter, coil and power/ground to the coil and igniter. Then you would be left with the IC trigger circuit after verifying injector activity. Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 30, 2013, 6:58 PM)
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