Which ACDelco Ignition Control Module is the best one for 88 GT? (Page 1/2)
Fiero Vice JAN 08, 11:38 PM
For 88 GT:

ACDelco D1943A VS ACDelco D1984A

Which one is better? Is there any difference between those two?

Every source I looked up leads me to dead end.

If you know a lot about this subject, please share it with us so we can keep our Fiero alive.

Thank you.
fierogt28 JAN 09, 12:03 AM
The D1943A is the stock replacement for the 88V6.
I have the AC Delco ICM on both of my 88s.

The other module you listed isn't the right part number for the car.

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fierogt28

88 GT, Loaded, 5-speed.
88 GT, 5-speed. Beechwood interior, All original.

unboundmo JAN 09, 01:46 AM
I'm running the D1943A as well when I rebuilt my distributor..... it has the correct logo stamping as stock too that I noticed.

https://www.amazon.com/ACDe...nition/dp/B000BYGD7E

[This message has been edited by unboundmo (edited 01-09-2018).]

Fiero Vice JAN 09, 02:31 PM
Thanks, Fierogt28 & Unboundmo, for confirming which one you guys use.

Also, I noticed on eBay, another ACDelco part, D1960A, match up for Fiero GT. Hmm

But when I looked up D1960A on Amazon, it says it's not compatible. How strange!

When I used the part number # 10496269 for ICM from 22P book, it ties to D1960A.

Oh boy, sometime it gets confusing trying to find the right part. Ha

[This message has been edited by Fiero Vice (edited 01-09-2018).]

fierogt28 JAN 10, 01:54 AM
Ya, the D1960A is listed for the 86GT, but the 85GT is listed the same for the 87-88GT. (D1943A)

I have no idea why this is...

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fierogt28

88 GT, Loaded, 5-speed.
88 GT, 5-speed. Beechwood interior, All original.

Fiero Vice JAN 14, 02:08 AM
Guys, turns out both D1943A and D1984A are compatible for 88 GT.

Here's two pictures from ACDelco website for confirmation.



[This message has been edited by Fiero Vice (edited 01-14-2018).]

robymon JAN 15, 03:12 AM
Thanks for the info. My car has a D1943A on it.
fierosound JUN 09, 06:48 PM
Lets muddy the water some more... LOL
Apparently all the same, except for economy, middle and "professional" grade.




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My World of Wheels Winners (Click on links below)

3.4L Supercharged 87 GT and Super Duty 4 Indy #163

[This message has been edited by fierosound (edited 06-10-2020).]

fierosound JUN 09, 07:34 PM
Then there's the "performance" modules.
I had an Accel one once - died after a year.

Davis usually has good products.
But this may just be a Delco module with his sticker on it.

[This message has been edited by fierosound (edited 06-10-2020).]

cvxjet JUN 09, 09:18 PM
Has anyone tried the DUI module? As stated above, DUI usually has quality stuff....On their website they claim "Longer Dwell" and go on to state "Better idle, and low end performance....Anyone...?