90-92 Computer, 7 pin Ignition control module?
#1
90-92 Computer, 7 pin Ignition control module?
as I am digging into this car and the gremlins, when I look up modules or Dizzy's for this rig, I'm getting the distributor that has the "flat" side with two plugs, not the typical HEI large cap, that I replaced on my car. As I am new to these motors, and I know the ECM controls timing, now I'm paranoid that I was throwing 1987 parts at this thing, however I did replace the stock, or what appeared to be the stock A/C Delco distributor with a Chevy plug and play DUI, maybe I'm over thing this. P
ics are what I have on what is at least a 90-92 ECM
ics are what I have on what is at least a 90-92 ECM
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Re: 90-92 Computer, 7 pin Ignition control module?
Yes, the '90 - '92 f-body TPI set ups used the small cap distributor with the remote coil. You can ask for '90 - '91 y-body (Corvette) distributor parts as they stayed with the big cap distributors.
RBob.
RBob.
#3
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Re: 90-92 Computer, 7 pin Ignition control module?
Originally Posted by JeepingDrake
as I am digging into this car and the gremlins, when I look up modules or Dizzy's for this rig, I'm getting the distributor that has the "flat" side with two plugs, not the typical HEI large cap, that I replaced on my car. As I am new to these motors, and I know the ECM controls timing, now I'm paranoid that I was throwing 1987 parts at this thing, however I did replace the stock, or what appeared to be the stock A/C Delco distributor with a Chevy plug and play DUI, maybe I'm over thing this.
- Rob
Last edited by Street Lethal; 02-24-2021 at 09:26 AM. Reason: Was more specific...
#5
Re: 90-92 Computer, 7 pin Ignition control module?
So does it really matter if there is a large cap in the car vs small cap? Am I missing something here in my ignorance? The car ran fine until recently. waiting for my data cable from Moats.
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Re: 90-92 Computer, 7 pin Ignition control module?
I have no idea why GM changed between large and small cap distributors (maybe inventory on hand?). I've run both in various vehicles. Didn't matter to me as long as it cleared the firewall (big cap won't on 1st gen f-body cars, but does on the El Camino).
RBob.
#7
Re: 90-92 Computer, 7 pin Ignition control module?
Doesn't he need to run the ANHT/AXCN Vette spark latency tables if he's running the big cap distributor?
The tables are significantly different between AXCN/ANHT and the Camaro AUJP.
My recent experience with modules vs latency tables shows you can get very different results in the spark timing being commanded by the ECM vs what comes out at the distributor.
The tables are significantly different between AXCN/ANHT and the Camaro AUJP.
My recent experience with modules vs latency tables shows you can get very different results in the spark timing being commanded by the ECM vs what comes out at the distributor.
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#9
Re: 90-92 Computer, 7 pin Ignition control module?
You'd have to run that test in that other thread.
https://www.thirdgen.org/forums/diy-...ncy-table.html
Which is why it's probably better to get a Delco original since we know those work with the factory latency tables.
https://www.thirdgen.org/forums/diy-...ncy-table.html
Which is why it's probably better to get a Delco original since we know those work with the factory latency tables.
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