Ignition Module

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Jul 1, 2010 | 06:25 PM

DanielA

Thread Starter

Heel & Toe

Joined: Aug 2009

Posts: 20

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Ignition Module

I just went down to start my 77 L82 to drive home from work and it is completely dead (turns over but won't start). I am pretty sure it is the ignition module AGAIN. This part has failed 4 or 5 times in this cars 54,000 mile life. I assume that it has the same ignition system that was used on other GM cars of that era and I am not aware that it is a particularly troublesome system. Any ideas on why my car is so hard on these things????

Jul 1, 2010 | 06:56 PM

Duke94

Le Mans Master

Joined: Mar 2001

Posts: 6,640

Likes: 287

From: Ann Arbor Michigan

About the only things an electronic module don't like are heat and to much voltage. Check also for a good ground.

Gary

Jul 1, 2010 | 06:57 PM

...Roger...

Race Director

Joined: May 2006

Posts: 16,528

Likes: 53

From: Dayton, Ohio

I think when they get old its best to replace the pickup coil and module. Be sure to put the silicone grease under the module to help with heat transfer.

Jul 2, 2010 | 07:09 AM

BassCat

Racer

Joined: Dec 2007

Posts: 445

Likes: 2

From: Thomastown Mississippi

I've been through a couple. Always carry a spare, and yes, put the grease under it.

Jul 2, 2010 | 08:38 AM

Aflac

Race Director

Joined: Oct 2002

Posts: 12,065

Likes: 2

From: Smalltownville Michigan

Cruise-In 5, 6 & 10 Veteran

St. Jude Donor '09

Quote:

Originally Posted by ...Roger...

I think when they get old its best to replace the pickup coil and module. Be sure to put the silicone grease under the module to help with heat transfer.

I know when i had issues with my truck, the problem kept coming up until I did this...

Jul 2, 2010 | 07:09 PM

Secret Squirrel

Drifting

Joined: Jul 2000

Posts: 1,347

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From: Melbourne Australia

Maybe buy some decent thermal grease form a computer store

Jul 4, 2010 | 09:56 AM

bluthundr

Burning Brakes

Joined: Jan 2006

Posts: 1,223

Likes: 174

From: Fort Wayne IN

I've always heard it is good to match the module and the coil to the same brand. I keep an extra of each behind the seat.

Jul 6, 2010 | 10:22 AM

DanielA

Thread Starter

Heel & Toe

Joined: Aug 2009

Posts: 20

Likes: 0

Thanks for the thoughts. I always put in the silicone grease and I always carry a spare module (just not all the tools I need to change it out wearing a suit and tie). I will try changing the coil too.

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Jul 6, 2010 | 10:47 AM

69427

Tech Contributor

Joined: Jun 2004

Posts: 20,905

Likes: 962

From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.

Quote:

Originally Posted by DanielA

Are you putting the correct silicone grease on the backplate?

Jul 7, 2010 | 01:00 PM

#10

Wrecked82

Le Mans Master

Joined: May 1999

Posts: 6,692

Likes: 29

From: Texas

Some time ago in my 82 I bought a DUI coil and module. Module lasted about 3 years. Replaced it with the original module and it is still running fine. That is about 28 years, minus the 3 or so on the DUI.

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