Ignition modules.
Thread Starter
Drifting
Joined: Sep 2003
Posts: 1,948
Likes: 2
From: Southern England
Ignition modules.
Hi does anyone know if ignition modules can be rebuilt or tested. I have a spare one that looks like the small screws have been unscrewed at some point, leading me to think it has failed at some time. Thanks.
Le Mans Master
Joined: Sep 2000
Posts: 6,303
Likes: 714
From: Bartlett IL
No it can't. It's epoxied internally. Really no way to take stuff off components. Done for shielding and heat.
Tech Contributor
Joined: Aug 2006
Posts: 9,933
Likes: 103
From: Peoria Arizona.. Resident Gold Cylon
Thread Starter
Drifting
Joined: Sep 2003
Posts: 1,948
Likes: 2
From: Southern England
I did try it out on the car and it started but didn't run well, so put my original back on.
I know very little about ignition modules and thought I would enquire about it. Also heard they are hard to come by and before I throw it away wanted to know if they are rebuildable.
That is all.
I know very little about ignition modules and thought I would enquire about it. Also heard they are hard to come by and before I throw it away wanted to know if they are rebuildable.
That is all.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Thread Starter
Drifting
Joined: Sep 2003
Posts: 1,948
Likes: 2
From: Southern England
That's what I've been hearing Vette Daddy. I'm building up a spare LT5 I've got and was hoping to make use of this one, if they were rebuildable, which they're obviously not. I'm in no hurry, so will keep an eye out for one at a later date.
Team Owner
Joined: Sep 2003
Posts: 25,406
Likes: 2,744
NO !!!!
There are actually two part numbers for the LT5 also. What is the number that is "INKED" on the one that you have? I would not just toss it. The information from the one that you're using and the one that you've got as a spare would/could be of importance to the fact that it ran but ran poorly. An early one requires a substantially different air gap at the crank sensor than the later more popular DIS.
There are actually two part numbers for the LT5 also. What is the number that is "INKED" on the one that you have? I would not just toss it. The information from the one that you're using and the one that you've got as a spare would/could be of importance to the fact that it ran but ran poorly. An early one requires a substantially different air gap at the crank sensor than the later more popular DIS.
Pro
Joined: Apr 2007
Posts: 567
Likes: 36
From: Fairfax VA
Here is a link to Marc Haibeck's site with further information on the ignition module:
http://www.zr1specialist.com/HAT%20W...n%20module.htm
http://www.zr1specialist.com/HAT%20W...n%20module.htm
Le Mans Master
Joined: Sep 2000
Posts: 6,303
Likes: 714
From: Bartlett IL
NO !!!!
There are actually two part numbers for the LT5 also. What is the number that is "INKED" on the one that you have? I would not just toss it. The information from the one that you're using and the one that you've got as a spare would/could be of importance to the fact that it ran but ran poorly. An early one requires a substantially different air gap at the crank sensor than the later more popular DIS.
There are actually two part numbers for the LT5 also. What is the number that is "INKED" on the one that you have? I would not just toss it. The information from the one that you're using and the one that you've got as a spare would/could be of importance to the fact that it ran but ran poorly. An early one requires a substantially different air gap at the crank sensor than the later more popular DIS.
Le Mans Master
Joined: Jul 2009
Posts: 7,182
Likes: 101
From: Pendleton IN
NO !!!!
There are actually two part numbers for the LT5 also. What is the number that is "INKED" on the one that you have? I would not just toss it. The information from the one that you're using and the one that you've got as a spare would/could be of importance to the fact that it ran but ran poorly. An early one requires a substantially different air gap at the crank sensor than the later more popular DIS.
There are actually two part numbers for the LT5 also. What is the number that is "INKED" on the one that you have? I would not just toss it. The information from the one that you're using and the one that you've got as a spare would/could be of importance to the fact that it ran but ran poorly. An early one requires a substantially different air gap at the crank sensor than the later more popular DIS.
Team Owner
Joined: Sep 2003
Posts: 25,406
Likes: 2,744
Hey Brett,
I didn't mention the "running poorly" but the OP mentioned it ran well with his other! We don't know which the car needs, which he attempted or if his are actually matches (2 of the same). The early is mentioned to only be in the 1st 500 builds but my '90 #653 has an early DIS. I've no reason to suspect it's NOT the original but I have NOT checked for shims at the crank sensor either. I put 20K problem free miles on it. The #1103841 I understand isn't nearly as sensitive to air gap but I certainly can't attest to that as fact.
I believe even a bad one if it was confirmed to be bad could be a good "diagnostic tool" - if the DIS exhibited the same run characteristics on every engine it was installed on but it eliminated a particular issue that the engine being diagnosed exhibited then I guess you could assume you've maybe found something that needs to be addressed. Make sense?
I didn't mention the "running poorly" but the OP mentioned it ran well with his other! We don't know which the car needs, which he attempted or if his are actually matches (2 of the same). The early is mentioned to only be in the 1st 500 builds but my '90 #653 has an early DIS. I've no reason to suspect it's NOT the original but I have NOT checked for shims at the crank sensor either. I put 20K problem free miles on it. The #1103841 I understand isn't nearly as sensitive to air gap but I certainly can't attest to that as fact.
I believe even a bad one if it was confirmed to be bad could be a good "diagnostic tool" - if the DIS exhibited the same run characteristics on every engine it was installed on but it eliminated a particular issue that the engine being diagnosed exhibited then I guess you could assume you've maybe found something that needs to be addressed. Make sense?
Thread Starter
Drifting
Joined: Sep 2003
Posts: 1,948
Likes: 2
From: Southern England
When I trial fitted the spare IM the car started but back fired, popped and banged.
The numbers on the spare I have are OL19A and 3841.
Also a bar code with 1103841 above it.
The numbers on the spare I have are OL19A and 3841.
Also a bar code with 1103841 above it.
Thread Starter
Drifting
Joined: Sep 2003
Posts: 1,948
Likes: 2
From: Southern England
Here is a link to Marc Haibeck's site with further information on the ignition module:
http://www.zr1specialist.com/HAT%20W...n%20module.htm
http://www.zr1specialist.com/HAT%20W...n%20module.htm
Team Owner
Joined: Sep 2003
Posts: 25,406
Likes: 2,744
Thread Starter
Drifting
Joined: Sep 2003
Posts: 1,948
Likes: 2
From: Southern England
Team Owner
Joined: Jul 2002
Posts: 37,053
Likes: 69
From: This city NEVER sleeps! Frank's back yard!
NO !!!!
There are actually two part numbers for the LT5 also. What is the number that is "INKED" on the one that you have? I would not just toss it. The information from the one that you're using and the one that you've got as a spare would/could be of importance to the fact that it ran but ran poorly. An early one requires a substantially different air gap at the crank sensor than the later more popular DIS.
There are actually two part numbers for the LT5 also. What is the number that is "INKED" on the one that you have? I would not just toss it. The information from the one that you're using and the one that you've got as a spare would/could be of importance to the fact that it ran but ran poorly. An early one requires a substantially different air gap at the crank sensor than the later more popular DIS.