1993 ECM Repair
04-29-2012, 06:16 PM
#21
Instructor
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Well the new ECM came with a PROM, so now I have two of each. I did notice that a lot of places specifically tell you to take your PROM out and keep it before sending the ECM off to them.
06-07-2012, 02:08 AM
#22
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Your ECM should be #16159278 "Right"? I sent mine in through a NAPA dealer, it was gone for about 10 days and came back. I think they charged me $190 dollars.
I have heard these ECM's are getting rare for the 1992-1993 so I decided to find a spare.
I went to Chevy dealers and the National salvage yard system and could not find one.
I did a bunch of research on this and was informed that these ECM's are getting rare, but they were not just used on Corvettes. This part number was also used on Camaros, Firebirds, Cadillacs, Impalas and Buick Roadmasters that were equipped with LT1's.
There is a difference in the PROM between a Corvette and all the others. I found a Camaro ECM on E-bay for $150 and removed the PROM and bought one at a Chevy dealer.
The Camaro PROM did have a different part number.
I now have a complete spare unit and I have had it in the car and scanned with Datamaster and seen no difference.
When I searched E-Bay for an ECM, there are hundreds of them listed. I could not find one using the search for a "Corvette ECM", so I searched for a "Chevrolet ECM". I found hundreds of pictures to look at until I found one. I also found one just listed under "ECM".
I have only had a knock sensor alarm one time. The car had been sitting quite a while and the battery was low on charge and it was a little jerky on the start. I charged the battery, cleared the alarm and it seems to be OK now.
I have heard these ECM's are getting rare for the 1992-1993 so I decided to find a spare.
I went to Chevy dealers and the National salvage yard system and could not find one.
I did a bunch of research on this and was informed that these ECM's are getting rare, but they were not just used on Corvettes. This part number was also used on Camaros, Firebirds, Cadillacs, Impalas and Buick Roadmasters that were equipped with LT1's.
There is a difference in the PROM between a Corvette and all the others. I found a Camaro ECM on E-bay for $150 and removed the PROM and bought one at a Chevy dealer.
The Camaro PROM did have a different part number.
I now have a complete spare unit and I have had it in the car and scanned with Datamaster and seen no difference.
When I searched E-Bay for an ECM, there are hundreds of them listed. I could not find one using the search for a "Corvette ECM", so I searched for a "Chevrolet ECM". I found hundreds of pictures to look at until I found one. I also found one just listed under "ECM".
I have only had a knock sensor alarm one time. The car had been sitting quite a while and the battery was low on charge and it was a little jerky on the start. I charged the battery, cleared the alarm and it seems to be OK now.
one , but i have no idea whith is the correct ecm for a 92 lt1 6speed
, thank you
06-07-2012, 03:29 AM
#23
Drifting
04-06-2013, 04:52 PM
#28
code 43 knock sensor test
I just wanted to make a note to this thread and reinforce the second post recommendations of toptechx6 to follow the diagnostic tree. I too had been battling the code 43 on my 92 lately. What I found was wiring from the ECM to the knock sensors tested good with continuity and no shorts to ground. I tested and achieved the proper voltage from the ECM to the knock sensors (4.8V). I then tested and achieved the proper resistance from the knock sensors to the knock sensors chassis (3.8K ohms). When I re-read the diagnostic tree, I had failed to test the resistance from the engine block. There I found one of the knock sensors resistance was open (infinity). Then I realized that sensor had worked its way loose and was hand tight.. When I torqued it down, the sensors chassis made proper connection with the block and the proper resistance was achieved between the sensor and the block. Problem solved.
07-09-2013, 01:24 PM
#29
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92' ECM possible problem
hello- my symptoms are zero mph, the instant gas mileage is zero, the range is zero but when the car warms up, the speedometer begins to work. When I engage cruise control, the speed fluctuates a few miles per hour constantly.
Do I have a bad ECM?
Thanks,
Chris
Do I have a bad ECM?
Thanks,
Chris
07-09-2013, 01:46 PM
#30
Drifting
Sounds like a VSS (speed sensor), or a device in the instrument panel failing to process information correctly. Connect to the ALDL port with a scan tool, or laptop to see if the ecm is reading the VSS correctly. Honestly, I'm thinking it's in the dash.
09-25-2019, 04:10 AM
#32
Drifting
Don't think there are any "New" ECMs out there, only used or rebuild ECMs. They can be found on ebay.
https://www.ebay.com/sch/i.html?_fro...59278&_sacat=0
https://www.ebay.com/sch/i.html?_fro...59278&_sacat=0
