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Old 01-24-2008, 06:13 AM   #1
marvxyz1
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HEI distributer

I have a 1980 GMC 6 automatic and I am wondering if my original distributer is a HEI ignition. I would like to improve the way this GMC runs, as it sputters when cold and doesn't give very good gas mileage. It seems, that if I can upgrade the ignition maybe it would run better. Marvxyz1
Thanks for any possible input!!!!!!!!!!
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Old 01-24-2008, 06:56 AM   #2
slug
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Re: HEI distributer

Is The Coil In The Distributor Cap?? If So Its A Hei(if Its A Stock 80 Model It Probably Is)
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Old 01-24-2008, 07:51 AM   #3
Captkaos
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Re: HEI distributer

HEI started on these truck in 1975, and 80 should definitely have one. Putting points in one is like putting a hand crank on the crankshaft.
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Old 01-24-2008, 08:06 AM   #4
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Re: HEI distributer

Sounds like you need to rebuild the carb....
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Old 01-24-2008, 08:09 AM   #5
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Re: HEI distributer

prolly if left alone original its a HEI but are you sure the problem is in the ignition and not the carb
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Old 01-24-2008, 08:45 AM   #6
marvxyz1
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Re: HEI distributer

Sounds like I should probably check the carb when the weather breaks.
Thanks a lot everybody marvxyz1
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Old 01-24-2008, 10:03 AM   #7
gchemist
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Re: HEI distributer

Check the choke. I bet it is opening too fast for a cold carb. I adjust my carb twice a year. Summer and winter. I adjust the choke so it stays closed longer during the winter.

If it runs fine after it's warm/hot, the choke is a likely problem.
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