C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Ign Coil Module any ideas????

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Old Aug 19, 2005 | 09:43 PM
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to be honest, I would get a new pigtail.
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Old Aug 19, 2005 | 09:51 PM
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Originally Posted by Redeasysport
You can use hight temp silicone on it.That one wire does not look that good.That is the ground right? Looks rusty from what I see.Use some electrical contact cleaner if you have it to clean your plugs.
Didn't notice any rust. I notice this alot when I try to take pictures of engine parts sometimes I gets the red dusty look to things. I figured it is just brake dust that scatters all around.

What about that liquid tape I've heard about?
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Old Aug 19, 2005 | 09:54 PM
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Originally Posted by bogus
to be honest, I would get a new pigtail.
I thought of that a couple days ago and asked Chris. Nothing available.

He said that GM discontinues wire harnesses after three years. I asked, well what to people do when these things require replacing. He said try to repair it?
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Old Aug 19, 2005 | 09:59 PM
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Some black High Temp RTV sould do it all you are doing is insulating it.I doubt this is the source if it was one of the signal wires I would be more worried about it.Since it is ground the only thing that could happen is another open wire could short to it.

I seem to remember somewhere there are aftermarket harnesses available if you could find the source mabey you could get a plug from them.Boneyard is another thought.

Last edited by Redeasysport; Aug 19, 2005 at 10:04 PM.
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Old Aug 19, 2005 | 10:54 PM
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Originally Posted by 93JetJocky
Opps forgot to ask, do you think that when things heat up this could be causing the problem.

Also, do you thing that wrapping each wire with electrical tape independently, then all four together would solve this issue?
You can get a "weatherpack" pin extractor, remove that pin & wire, clean it good and cover it with heatshrink. They make a heatshrink that has heat activated glue on the inside, this should seal it up good.
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Old Aug 19, 2005 | 11:02 PM
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Originally Posted by Morley
You can get a "weatherpack" pin extractor, remove that pin & wire, clean it good and cover it with heatshrink. They make a heatshrink that has heat activated glue on the inside, this should seal it up good.
Any idea where I can find such a thing. I been doing search on the net. I did locate a catalog with every stinkin connector used by GM, with the exception of the ignition coil module 4-way F Metri-pack 150 series.

If anyone wants this catalog, its in PDF about 2MBs, email for a copy.
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Old Aug 19, 2005 | 11:24 PM
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Originally Posted by 93JetJocky
Any idea where I can find such a thing. I been doing search on the net. I did locate a catalog with every stinkin connector used by GM, with the exception of the ignition coil module 4-way F Metri-pack 150 series.

If anyone wants this catalog, its in PDF about 2MBs, email for a copy.
I bought a set of automotive pin extractors from Advance Auto a few years ago.
The weather pack extractor is just a metal tube (with handle) that slips over the pin snugly. You wiggle it down into the connector over the pin until the pin releases from the connector. You could probably make one easily from some brass tubing (hobby store). You might be able to find the heatshrink there too.
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Old Aug 19, 2005 | 11:35 PM
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I'll check with them tomorrow they are right around the block from me. I'll also check with NAPA too. Can you believe this NAPA list the part for the ignition coil module connector for an LT5. Ecklers has nearly every connector except this one.

Thanks
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Old Aug 19, 2005 | 11:40 PM
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Bogus... I find this awfully interesting. While looking through the Ecklers catalog they show a picture of the Ignition Coil Module for a 92-93, and the image is rather large and clear. You can see the number on it and it is 799-2A29 (page 132 of their catalog no 205.). Now the one Chris over nighted to me has the same number on it. The two I got from Bill Heard has 799-4L10 on it.
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Old Aug 19, 2005 | 11:56 PM
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Reguardless a ground being slightly uncovered will not cause a problem.When I said ground before I meant either an open ground or a short to ground.We have unshielded grounds all over the place at work and the plant still runs.In fact a lot of electronic conections use a ground and a unshielded drain that is connected to ground on our networks. It is not a big thing unless another wire can short to it. So what is going on did you get the new ECM in?
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Old Aug 19, 2005 | 11:58 PM
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Originally Posted by 93JetJocky
Bogus... I find this awfully interesting. While looking through the Ecklers catalog they show a picture of the Ignition Coil Module for a 92-93, and the image is rather large and clear. You can see the number on it and it is 799-2A29 (page 132 of their catalog no 205.). Now the one Chris over nighted to me has the same number on it. The two I got from Bill Heard has 799-4L10 on it.
That is significant there ARE differences between modules and years so mabey you have the wrong year module.I would try it out and see what happens.
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Old Aug 20, 2005 | 12:03 AM
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Originally Posted by 93JetJocky
Bogus... I find this awfully interesting. While looking through the Ecklers catalog they show a picture of the Ignition Coil Module for a 92-93, and the image is rather large and clear. You can see the number on it and it is 799-2A29 (page 132 of their catalog no 205.). Now the one Chris over nighted to me has the same number on it. The two I got from Bill Heard has 799-4L10 on it.
that is interesting... most very interesting....

The Delco part number (NOT GM!) is D1971A.
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Old Aug 20, 2005 | 12:07 AM
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That would be too easy.... and on top of that I would be kicking my *** down the street and back, because I could have waited for Chris to get it to me second day air or over night but decided since Bill Heard said they had one I could get it local. Then I'll be really pissed because they reamed me for $160. I didn't even bother to look at Ecklers either at the time, at they list for $99. So you can see if I do that and it works... well lets just say I'll need a bottle of something to calm me down.

Ok, on a serious note as if that ain't serious enough I'm going to try it just for grins.

No I haven't installed any of these new components yet, as I got side tracked with the wire harness then looking for a replacement, pigtail, or repair kit.

I'm wondering if this coil module works should I still replace the ECM anyway?

I'll be right back this won't take but a minute...
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Old Aug 20, 2005 | 12:24 AM
  #94  
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No do not replace the ECM if the module is good wait a couple of days and see what happens so you will be able to return it.
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Old Aug 20, 2005 | 01:07 AM
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Well besides dropping a bolt for a ground connections that I had off and taking for ever to find it.

Nope it couldn't be that simple. Same thing cranks no fire. Plug the old one back in touch the starter it fires instantly.

I guess I start again in the morning, put the new coil and module on and see what happens then.

This is just absolutely crazy. It makes no logical sense!
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Old Aug 20, 2005 | 01:14 AM
  #96  
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Sorry to hear that. I agree it makes no sense.It will end up being a really simple thing I bet.Usually does when it gets this complicated.I hate to say it but it may be time to call Gordon.
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Old Aug 20, 2005 | 01:20 AM
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Originally Posted by bogus
that is interesting... most very interesting....

The Delco part number (NOT GM!) is D1971A.
Yeah all three have the number on the boxes.
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Old Aug 20, 2005 | 01:21 AM
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Originally Posted by Redeasysport
Sorry to hear that. I agree it makes no sense.It will end up being a really simple thing I bet.Usually does when it gets this complicated.I hate to say it but it may be time to call Gordon.
I think your right on that. Well thanks ya'll I'm going to bed.
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Old Aug 20, 2005 | 08:46 AM
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Originally Posted by 93JetJocky

Nope it couldn't be that simple. Same thing cranks no fire. Plug the old one back in touch the starter it fires instantly.
Here is the way I see it -- most probable to least probable order:

1) I'm still betting the connector to the Ignition Control Module is defective -- and, it is making a poor connection to the old module and no connection to the new one.

2) Defective tach filter

3) Poor connectioin in the wiring harness in the wire from the ECM to the Ignition Control Module.


Tom Piper
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Old Aug 20, 2005 | 09:10 AM
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Morning Tom,

I'm just curious how or why would a defective tach filter not allow it to start with a new ICM but work with the old one?

I'm on the phone now with Ecklers trying to locate the ICM connector pig tail.
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