Delco Ignition upgrade questions. - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-08-2005, 01:26 PM   #1
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Default Delco Ignition upgrade questions.

I'm sorry to be posting this topic again, especially when it has been discussed so many times.
I still have that old magnavox Ignition in the car.
I went to the yard to see if I could find some coils from a newer 92+ H body.
All I could find were the ignition for a 3100, 3300. They didn't have what appeared to be the same plug?? They didn't have one for a newer 3800.

If I find an ignition, with the mountings and whatnot, from a 92+ H body, will it plug directly into my current electrical harness? Or, am I gonna have to cut some wires, make some new connections? Or should a 3300, 3100 from a 93 and up work? They didn't have the same connectors, nor the same amount of wires.

Thanks a bunch!!
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Old 11-08-2005, 01:57 PM   #2
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The coil packs are the same from the 3100 and other engines, but NOT the ICM. You need an ICM from a 3800 ONLY. Any 3800 ICM will plug directly into your harness. No wire cutting needed. The mounting bracket and bolts need to come from pre-95 L27 or L67 (someone verify) if you want it to bolt up perfectly.

When I did mine, I got the entire thing from a 93 Bonne...brackets, ICM and coils.
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Old 11-08-2005, 03:25 PM   #3
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I lifted the coils and ECM from a '94 3800. It bolted straight in; no mods.
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Old 11-08-2005, 06:02 PM   #4
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ooook, now I understand. I can get a delco ignition coil from any GM V6, but the plugs won't be the same. I just take the top, or the coil pack, off, and plug it into my existing icm.

If I however, get a 3800 from a 92 and up, it'll plug and bolt directly on.

Thanks..
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Old 11-08-2005, 08:08 PM   #5
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Quote:
Originally Posted by Timothy'* Buick
ooook, now I understand. I can get a delco ignition coil from any GM V6, but the plugs won't be the same. I just take the top, or the coil pack, off, and plug it into my existing icm.

If I however, get a 3800 from a 92 and up, it'll plug and bolt directly on.

Thanks..
Nope, not quite. Your Magnavox ICM will not work with Delco coils.

The coils are nearly universal in GM vehicles. Mine were from a 3100.

The ICM must be from a Delco (type II) 3800 application.

The mounting plate (under the ICM and coils) needs to be from a Series I 3800. There was some speculation about the possibility of a 3300 bracket being the same, but I don't know.

Or... just read my writeup on the subject, complete with pictures of what you need to do.
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Old 11-08-2005, 08:14 PM   #6
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Quote:
Originally Posted by captainmiller
You need an ICM from a 3800 ONLY.

ACTUALLY, I got my bracket from a 3.3L GA, along with the ICM and coils ( since it was sold as one unit). I have a ICM from a 96 Riviera SC and the coils from it also. When I was having a hard time starting the car after the new engine was installed along with the ignition conversion, I decided to check out the ICM from the 3.3L GA I had sitting there. It bolts up and plugs in just fine, that is what is on my car right now.

So I have the bracket from a 3.3L GA, ICM from the same car, and coils from the 96 Riviera SC( same as the 97+ SSEI) . Never did figure out that odd starting issue.
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Old 11-08-2005, 08:18 PM   #7
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Quote:
Originally Posted by sse1990
ACTUALLY, I got my bracket from a 3.3L GA, along with the ICM and coils ( since it was sold as one unit). ... It bolts up and plugs in just fine, that is what is on my car right now.
Huh, that'* good to know. So the old 3300 units should work too. Darn it, now I have to modify my writeup.
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Old 11-08-2005, 08:26 PM   #8
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Not sure what year it is from though. All I know is that is was a 3.3L GA ( since that is what they wrote on the coils/ICM), LOL.

I am almost tempted to re-install the old magnavox system just to see how it runs, to see if I still have the same starting issue.
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Old 11-09-2005, 08:22 PM   #9
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Default delco

No mods needed. Just unbolt the whole ICm/coil assembly from a 93, 94.
Three nut on the bottom unplug and out it comes.
Simply bolt on to your braket.
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Old 11-11-2005, 02:11 PM   #10
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Is one ICM for the single ring balancerand a second for the dual ring balancer. They have different plug keys on the harness so if it will plug in, it is the right ISM. It only handles basic timing anyway, the actual tuning of the advance is done by the ECM based on the PROM values and that is unique to the engine.
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