C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Aug 19, 2002 | 08:26 PM
  #1  
terry82's Avatar
terry82
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From: columbia city in
Default hei coil

can a hei coil go bad slowly or do they just go out?trying to figure out if the coil is bad or the modual in the distibuter is bad .
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Old Aug 19, 2002 | 08:49 PM
  #2  
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QuickVet
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From: CT
Default Re: hei coil (terry82)

who made the distributor?

i think the coil can slowly go bad. i had be advised to change mine even tho the car still ran. tho it wasnt running that great.


[Modified by QuickVet, 7:50 PM 8/19/2002]
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Old Aug 19, 2002 | 09:57 PM
  #3  
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Jvette73
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From: Severna Park Md
Default Re: hei coil (QuickVet)

Ive had many a modules go bad...never had a bad coil...just my expierence.
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Old Aug 20, 2002 | 03:02 AM
  #4  
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glen242
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From: Moon Twp. PA USA
Default Re: hei coil (terry82)

I had a year old "performance" coil go bad all at once. Found a crack in it. No indication of a problem until it stopped working. Went home on a flat bed.
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Old Aug 20, 2002 | 04:33 AM
  #5  
riorata's Avatar
riorata
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Joined: May 2002
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From: Parker TX
Default Re: hei coil (terry82)

I have had several "coil n cap" coils go bad. Just cruising along at 3500 RPM or so, then backfire through carb and dead coil. I believe they overheat and open up dramatically. Very frustrating. I always carry a spare.

I intend to rectify my aftermarket MSD HEI distridutor situation as soon as I get back to the states.

:cheers:

From Bahrain
Desert Rat (for now) :flag
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Old Aug 20, 2002 | 04:47 AM
  #6  
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Desertdawg
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From: The Only Corvette in Gila Bend, Az.
St. Jude Donor '09
Default Re: hei coil (riorata)

I have had several "coil n cap" coils go bad.
Desert Rat (for now) :flag
I've seen this happen too..but a stand alone coil...Nope!!!!!


P.S. Hi Desert Rat :cheers:
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Old Aug 20, 2002 | 07:36 AM
  #7  
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From: Quincy IL
Default Re: hei coil (Desertdawg)

i just went thru a frustrating experience with this. my vette would start sometimes and sometimes not. I have a rebuilt distributor from Accel, 2 yrs old, and i took the ignition module to Autozone to test it, they ran it for about 5 minutes, no problem. so i test the pickup coil, and the pink wire to the distributor and everything is fine. the ignition coil itself was giving various readings, so i took it to another parts place and they tested it several times and thought it was not good. so i bought a new one,$30, went home,put everything back together and NO GO !!. in frustration i dug the old distributor out of the attic and wiped off the GM ignition module,put some dielectric grease on the bottom of it, installed it and VROOM!! runs like a top, that was last Thursday evening,drove it all weekend, no problems. So I'm going to run the 24 yr old ignition module with the GM logo on it til it drops.
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