[GobblerK5]

Sounds so familiar to my 1991 K5 Blazer gremlin...here's my swaptronics list:

And this troubled me so much from Aug 2014 til this year...that my Blazer hasn't been driven on the road since April 2016...I lost the trust factor in driving it.

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[GobblerK5]

Yep, I'm right there with you. Same issue and same attempts to fix an problem that doesn't want to be fixed. It just wants to torment me...

Mine is so sporadic you never know when it'll show its ugly self.

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[GobblerK5]

I've found and repaired several bad wires / grounds on mine and think "This is it!" only to have symptoms appear again. But repairing the bad wires was a necessity anyway...

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[GobblerK5]

You mean the ICM (Ignition Control Module) under the distributor cap... Shouldn't have HEI on a 93.

Buy a good ICM not a cheap one...heres the one that I have...

I also considered this one...

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[GobblerK5]

Check your wiring from coil to the ICM...and yes, also ensure ICM isn't fried

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