HEI Modules

[Terlingueno]

Found this listing on "that auction site". They are the 4 pin like my K20 has. The box is Delco like and says Made in USA and Fits Delco D-1906 1875990. Anyone have thoughts on these?

Pardon Our Interruption...

 

[Sad Sack]

I always thought Delco put part numbers on them...I could be wrong.

 

[Ricko1966]

Found this listing on "that auction site". They are the 4 pin like my K20 has. The box is Delco like and says Made in USA and Fits Delco D-1906 1875990. Anyone have thoughts on these?

Pardon Our Interruption...

The guys that have ignition module problems are usually the guys running low or mid grade parts store modules. The guys that don't have module problems are the guys that are running genuine gm modules. To the best of my knowledge genuine GM ( delco gold) and NAPA premium are the only modules that vary dwell.

 

[WFO]

I used this ACDelco pt # D1906 on mine. It's only about $13 more.

Amazon.com: ACDelco Professional D1906 (19180771) Electronic Ignition Control Module : Automotive

Buy ACDelco Professional D1906 (19180771) Electronic Ignition Control Module: Control Units - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

 

[Matt69olds]

The Delco 990 modules are considered the “performance” module. I have no clue what makes them special. It’s mention on the Buick, Pontiac and Chevelle forums.

 

[MikeB]

Here's my spare. Bought it at Rock Auto earlier this year.

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[Terlingueno]

Yeah, I have two like this, one lives in the glove box. I got them from the little mechanic shop that installed my crate motor, in the industrial part of Las Vegas. Looking for a couple three more just like them thus the haunting of "that auction site", just in case...

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[MikeB]

Looking for a couple three more just like them thus the haunting of "that auction site", just in case...

Have to ask why so many spares? I must be very lucky. Because in over 40 years and around 8-10 cars and trucks, including some 70s and 80s daily drivers, I've never had a module fail.

I bought the spare module just to have one in case GM stops making them. And they're not getting any cheaper. Are these real GM modules that are failing? And you are using thermal paste to transfer heat to the HEI plate?

Not picking on you, because I hear the same thing on other forums.

 

[Terlingueno]

Well I have had only one car, this one, since 1994. It is pushing 450K miles on the ODO. I have had two failures. One in 2006, in Death Valley in 120+ degree temps. I had my hood up, no cell coverage, of the five cars that passed by me in three hours, one stopped and gave me a ride to my quarters and got a coworker to tow me back. By that point, I had owned the truck 12 years by then and I think the module was the original. Fast forward 10 years and I had another module fail here. In 115 temps. Fortunately I had cell coverage and got a friend to tow me the 3 miles to my quarters. Since 2006, kept a spare in the glovebox so I could fix it on the side of the road. To answer your question, I want a cushion for the future. Just in case GM stops making them...

 

[Matt69olds]

Have to ask why so many spares? I must be very lucky. Because in over 40 years and around 8-10 cars and trucks, including some 70s and 80s daily drivers, I've never had a module fail.

I bought the spare module just to have one in case GM stops making them. And they're not getting any cheaper. Are these real GM modules that are failing? And you are using thermal paste to transfer heat to the HEI plate?

Not picking on you, because I hear the same thing on other forums.

Same here, I have had a few modules that would die when the engine got really hot, then restart when cold. But I have only had one outright fail.

The early HEI modules did have some issues. DELCO quickly figured out the issue. But the reputation remains.

Get a good DELCO or quality aftermarket module and install it with thermal paste, and they last.

 

[Ricko1966]

Saturation Time: Checking GM HEI module dwell. - Farm Machinery Digest

In 1975, General Motors, thru their Delco Electronics Division, completely rethought how an ignition coil was controlled. This was accomplished…

farmmachinerydigest.com

 

[ali_c20]

I run a DUI distributor and the module works as it should since 2014.
I changed 1 module long time ago (el cheapo from PO to ACDelco) and I used good thermal paste. I gave this distributor to a friend and it still works.
Don't cheap out on them and install with thermal paste. My 0.02$

 

[gmbellew]

Modules are one of the few things that will leave you dead in the water, take up almost no space to keep a spare, and can be changed with just a screwdriver in a short amount of time. It just makes sense to keep one, like it makes sense to keep some fuses, spare fluids, etc. and I 100% agree…use an AC Delco module and it should last a long time and you probably will never need the spare. But the cost of preparation is low.

 

[squaredeal91]

Surprise!! I ordered 2 and they just arrived. They definitely look like there as old as the boxes are. They look like a gm module in lots of ways but they don't say anything. They are heavy and im sure good quality being as old as they are. Either way not a bad deal.

Its just interesting that they don't say anything on them and that the box says fits Delco D-19061875990 and the box is blank otherwise, has the Delco symbol but doesn't actually say delco . Maybe they Are an oem economy line?

 

[Terlingueno]

Surprise!! I ordered 2 and they just arrived. They definitely look like there as old as the boxes are. They look like a gm module in lots of ways but they don't say anything. They are heavy and im sure good quality being as old as they are. Either way not a bad deal.

Its just interesting that they don't say anything on them and that the box says fits Delco D-19061875990 and the box is blank otherwise, has the Delco symbol but doesn't actually say delco . Maybe they Are an oem economy line?

Like I said in my original post, the box is "Delco Like" and the box pictured in the ebay listing has "Made In USA". There is another NOS D1906 on that site that appears to be a real Delco unit. Makes me wonder as to the origin of the original one I posted since it seems an effort to "Look Like" a Delco, and the same seller has some "remanufactured" units that look the same. So I dunno...

This is what looks to be a real one

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