Rusty Bowtie

General Category => Early Chevy/GM Discussion => Topic started by: ghost28 on January 03, 2018, 12:18:41 PM

Title: HEI DIST QUESTION
Post by: ghost28 on January 03, 2018, 12:18:41 PM
In my 84 blazer k5 it has a distributor that has an aditional 4 prong plug coming from it. Can I put a distributor in it with out this plug on it and bypass these wires? There is no computer.
Title: Re: HEI DIST QUESTION
Post by: EDNY on January 03, 2018, 01:01:14 PM
Looking at the attached diagrams it has an ECM.


https://www.partsgeek.com/gbproducts/DC/2973-05100349.html?utm_content=DN&utm_term=1984-1985+Chevrolet+K5+Blazer+Electronic+Control+Unit+A1+Cardone+84-85+Chevrolet+Electronic+Control+Unit&utm_source=google&utm_medium=ff&utm_campaign=PartsGeek+Google+Base&gclid=EAIaIQobChMIqOLG4rK82AIViLbACh1f_g38EAQYAiABEgLVMPD_BwE&ad=47433966132
Title: Re: HEI DIST QUESTION
Post by: EDNY on January 03, 2018, 04:53:15 PM
Autozone version:

Title: Re: HEI DIST QUESTION
Post by: ghost28 on January 03, 2018, 05:05:40 PM
Some had an ecm and some early ones didn't. This one has just the electronic spark module on top of the glove box. i think I have figured out a couple of ways to get rid of the spark module. 1 replacing the distributor and the other is correcting the original distributor.  I have a new speedway distributor so that's the way I will go.
Title: Re: HEI DIST QUESTION
Post by: ghost28 on January 04, 2018, 05:10:20 PM
Damn. I should have changed that 33 year old distributor and got rid of that spark box long . That damned old 84 k5 romps now and even spun the tires a bit
Title: Re: HEI DIST QUESTION
Post by: sammons on January 04, 2018, 05:53:08 PM
Damn. I should have changed that 33 year old distributor and got rid of that spark box long . That damned old 84 k5 romps now and even spun the tires a bit

Ghost i'm glad you got it up and running right. Years ago I had a buddy that had an '85 2dr Caprice Areo Coupe. It had been running crappy so when he finally had time to tune it up (plugs/wires, bug and cap)....didn't change a thing. He came by quizzing me, popped aircleaner off so i could see and I noticed the extra wires on distributor and wires to Q-jet. Walked over to my hoard and handed him a good '76 H.E.I. and a good older Q-jet. I told him me and electronic dodads (ESC,ECM etc) didn't get along, just forget the extra 4-wire plug.  He came back later with a big smile and a good running car ;D