HEI Diagnostics...help!
Thread Starter
Joined: Feb 2003
Posts: 1,229
Likes: 5
From: Albuquerque, NM
Car: 1966 El Camino Custom
Engine: 350
Transmission: 200R4
Axle/Gears: 3:73 12 bolt with Brute Strength
HEI Diagnostics...help!
Just dropped in a fresh motor in my IROC and she won't fire. I've got 12 volts to the HEI but no spark. Must be the HEI but where do I start to look for the problem. It's an MSD Super HEI with about 25 miles on it. Worked fine until the new motor was installed. Confused.
Senior Member
iTrader: (1)
Joined: Mar 2005
Posts: 646
Likes: 0
From: San Antonio
Car: 1981 Camaro; 1986 Z28
Engine: LT1; LT1
Transmission: 6 speed; 6 speed
Axle/Gears: 3.73; 3.42
check the control module. Make sure the voltage wire is plugged into the correct spot.
Thread Starter
Joined: Feb 2003
Posts: 1,229
Likes: 5
From: Albuquerque, NM
Car: 1966 El Camino Custom
Engine: 350
Transmission: 200R4
Axle/Gears: 3:73 12 bolt with Brute Strength
Perfect call on the module, LT1. I put in a spare module from Performance Distributers and it fired right up. Who would have guessed that the problem would happen after only 25 miles from such a reputable company as MSD? Hopefully I can get a refund. I don't recall what the duration of the warranty was.
Senior Member
iTrader: (1)
Joined: Mar 2005
Posts: 646
Likes: 0
From: San Antonio
Car: 1981 Camaro; 1986 Z28
Engine: LT1; LT1
Transmission: 6 speed; 6 speed
Axle/Gears: 3.73; 3.42
the gm style module is a funny thing. They give no warning of what is about to happen and then leave you stranded.
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