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No spark issue

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Old Jul 4, 2022 | 11:16 AM
  #1  
TARTED FIREBIRD's Avatar
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From: Weirton West Virginia
Car: 1992 firebird 90 Miata 95 explorer
Engine: 305
Transmission: T5
No spark issue

I知 sure this issue has been resolved on here before but I知 having trouble with my 92 305 firebird. Last week I was on my way home from work, no issues leading up (the day before I took it on a trip an hour away) and all of a sudden it just fell flat on its face. Happened to me once before and it ended up just being the icm. This time I tried a new icm, a new coil, and a whole new distributor. Security light turns on and off like it should, ran a series of tests and the ecm is good. At this point I知 lost. I will say at one point on the side of the road I did switch polarity from the pickup coil to the icm (the wire that only has around 5v or so) my excuse is I was tired/overwhelmed after a 12 hour shift and got them mixed up somehow. I知 not sure if doing that maybe did something catastrophic. One last thing to add, I did end up doing a manual swap on it two years ago and had the prom chip tuned. Any help would be appreciated thank you.
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Old Jul 4, 2022 | 11:21 AM
  #2  
Tuned Performance's Avatar
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No spark issue

What wire has 5v coil to icm pink wire?
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Old Jul 4, 2022 | 11:23 AM
  #3  
TARTED FIREBIRD's Avatar
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From: Weirton West Virginia
Car: 1992 firebird 90 Miata 95 explorer
Engine: 305
Transmission: T5
Re: No spark issue

Originally Posted by Tuned Performance
What wire has 5v coil to icm pink wire?
yes, sorry if I知 wrong but that痴 the wire I知 talking about, it said something like 1.5-8v in the book if I知 not mistaken.
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Old Jul 4, 2022 | 11:36 AM
  #4  
Tuned Performance's Avatar
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: No spark issue

The coil to icm
is 12v to power icm

https://easyautodiagnostics.com/gm/4...test%20lead%29.
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