My car has been sitting all summer because of very annoying engine hesitation problems. My mechanic with a tech 2 scanner pinpointed ECM issues and can see the O2 values go crazy after the ECM gets warmed up and you start tapping on it.

I sent the ECM off to A1 cardone to have it rebuilt and they bench tested the ECM for 1 week and certified it with a 12 month warrantty as problem free and 100% working. My mechanic that diagnosed the problem disagrees with A1 Cardones tests and still believes the ECM to be the problem. I agree that the ECM cannot be bench tested under the conditions that you would find under the hood of a car with heat and other factors.

SO here is the problem: I have had a GM dealer working to get me a reman ECM for a 1993 corvette and every time I call the availability date gets pushed back again and again and again. Right now I am looking at the end of September to get a reman ECM from GM.

There are ECMs EVERYWHERE for every single year except 93 for some reason. On Ebay you can find ECMs for 88,89,90,91,92,94,95, ECT but NO ONE HAS 1993!!

Any idea on why the 93 ECM is on the endangered species list? Anyone know a source where I can get one? I've looked all over the internets with no luck.

My next step is to look at Carlisle, which will be like finding a needle in a hackstack.

Im ready to light my car on fire and post the video on youtube.


Any info would be greatly appreciated.

Thanks

 

Two possible rebuilders here:

http://gmautocomputers.com/

http://www.siaelec.com/

Good luck, let us know how you make out.

 

The ECM part number is 16159278.
The same ECM is used in the 92-93 LT1 Corvette, 93 LT1 Camaro,
and 93 LT1 Trans AM.

 

yup, it's the same part but it's still impossible to find. case and point, i just called goecm.com, they have access to most boneyards in the country and Canada and the guy said he only had two come up from his search, both were being sold with the motor.
i had the exact same issue when the ecm failed in my 93. it's my understanding all 93 lt1's use different mapping than any other year, thus they are impossible to find. a word of advice: don't wait for gm to be restocked. they pushed back the restocking date 3 times on me before i found a guy in texas who rebuilds them. i would highly reccomend going that route rather than taking a can of gas and a match to your car just yet. darkghost, if i can find the guy's info who rebuilt mine, i'll PM it to you.

 

Here ya go, $395.

http://www.autopart.com/ecc/ECC1993C...ETCORVETTE.htm

 

Thanks for the info

 

WOW, $365 + $250 Core!

Thanks for the info, I may take that route. Can't believe you found one.

 

Try www.autoecms.com

 

So your car had crazy O2 readings after warming up to a hot temp and tapping on it? Maybe I AM on the right track here.

Let me know the details when you get a min. Thanks!

 

Thanks man

 

You're welcome. I have bought from this source twice and they were great. Also they sent me several super duper mini pocket knives and a refrigerator magnet with a Nash Metropolitan on it.

 

I just ordered the ECM from them. They are only a couple hours away from me so hopefully I should have it in the next few days.

 

looks like you found one! awesome, mine was a much bigger hassle to get.
my old ecm didn't have those same symptoms, it was just fried.

 

I found 3 just now, autopartsgiant.com, Napa and Advanceautoparts and I bought one in May from autopartsgiant and got it 5 days after ordering.