PCM replacement
Burning Brakes
Joined: Dec 2003
Posts: 1,243
Likes: 5
From: Loveland CO
might search car-part.com.. I didnt see any ECU (Engine Control Unit) listed but if you search 1997 Corvette and find another part, they may have the the ECU. You will need to have them reflashed to your car by the dealer. then you have to relearn the ECU to your security key. 1996, 1997 and 1998 where weird years for GM computers.. they changed a little each year in the early OBDII years which makes them hard to track down. Might check Rock Auto.
S
S
Thread Starter
Heel & Toe
Joined: Nov 2013
Posts: 19
Likes: 0
might search car-part.com.. I didnt see any ECU (Engine Control Unit) listed but if you search 1997 Corvette and find another part, they may have the the ECU. You will need to have them reflashed to your car by the dealer. then you have to relearn the ECU to your security key. 1996, 1997 and 1998 where weird years for GM computers.. they changed a little each year in the early OBDII years which makes them hard to track down. Might check Rock Auto.
S
S
Drifting
Joined: Nov 2011
Posts: 1,401
Likes: 141
From: Summerville South Carolina
Bill is spot on
I doubt that you have a PCM failure, however, until you post a complete list of PCM DTCs that you obtain by reading them through the DIC, it is difficult to be positive or to provide any helpful guidance.
If it were me, I would get the car out of the STEALERSHIP and allow us to LEAD GUIDE AND DIRECT!
Bill
If it were me, I would get the car out of the STEALERSHIP and allow us to LEAD GUIDE AND DIRECT!
Bill
Last edited by David Shiel; Nov 28, 2013 at 01:43 PM.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 301
From: Columbia SC
David had a bad BCM, his guy got a GM rebuilt and programmed it for his Key and options. I think the BCM was about $170 and some change for programming. I am sure he could test your PCM if you mailed it to him and if bad provide you a good tested one at minimal cost. I am thinking about having his guy get me a PCM and BCM and test and set them up for me to have in the future if I ever need to use for diagnostics or replacement on my car. I plan to have him do this and then ship them to me even though he is only 2 hours away in Charleston SC.
With that said, Bill is correct, we need to determine what IS the problem before you start throwing more part and money at the issue.
With that said, Bill is correct, we need to determine what IS the problem before you start throwing more part and money at the issue.
Burning Brakes
Joined: Oct 2007
Posts: 1,093
Likes: 33
From: Morristown TN
This question is really only because I am curious about this, I did not realize the new computers had to be programmed to the cars, till reading this thread.
If he found someone local with the same year car, could it be swapped over to test or would it still need programing?
If he found someone local with the same year car, could it be swapped over to test or would it still need programing?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
YES & NO!!
The PCM needs to have an operating program and tune Flashed into it for your year car.
Then,, It needs to be LINKED to the BCM. Its called a hand shake to satisfy the security protocol.. You can do it with a TECH2 or in an emergency, follow this procedure:
BCM/PCM RELEARN PROCEDURE
You will need to conduct the PCM/BCM relearn process. This matches their handshake ID's and allows them to talk to each other.
Do this before you worry about VATS issues:
1. Turn on the key for 11 minutes.
2 Turn off the key for 30 seconds.
3. Repeat 1&2 two more times.
4. Turn on the key for 30 seconds.
The car should start and run with the new BCM. Good luck and report back on your progress.
Shirl
SD Racing Enterprises
Aguila, AZ
Coutersy of MrEracer
Bill Curlee
The PCM needs to have an operating program and tune Flashed into it for your year car.
Then,, It needs to be LINKED to the BCM. Its called a hand shake to satisfy the security protocol.. You can do it with a TECH2 or in an emergency, follow this procedure:
BCM/PCM RELEARN PROCEDURE
You will need to conduct the PCM/BCM relearn process. This matches their handshake ID's and allows them to talk to each other.
Do this before you worry about VATS issues:
1. Turn on the key for 11 minutes.
2 Turn off the key for 30 seconds.
3. Repeat 1&2 two more times.
4. Turn on the key for 30 seconds.
The car should start and run with the new BCM. Good luck and report back on your progress.
Shirl
SD Racing Enterprises
Aguila, AZ
Coutersy of MrEracer
Bill Curlee
Thread Starter
Heel & Toe
Joined: Nov 2013
Posts: 19
Likes: 0
David had a bad BCM, his guy got a GM rebuilt and programmed it for his Key and options. I think the BCM was about $170 and some change for programming. I am sure he could test your PCM if you mailed it to him and if bad provide you a good tested one at minimal cost. I am thinking about having his guy get me a PCM and BCM and test and set them up for me to have in the future if I ever need to use for diagnostics or replacement on my car. I plan to have him do this and then ship them to me even though he is only 2 hours away in Charleston SC.
With that said, Bill is correct, we need to determine what IS the problem before you start throwing more part and money at the issue.
With that said, Bill is correct, we need to determine what IS the problem before you start throwing more part and money at the issue.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 301
From: Columbia SC
David is a friend of mine. If you PM or email me with your phone number I can discuss our contact for module testing using a Tech II. This guy is so good he started his own business and is not expensive.
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Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
You posted the PCM looked corroded on the outside but are there any holes in the case? You should open it and take a look at the circuit boards. I've got a '96 LT1 PCM that was in a car fire and the case is all black down one side and it even had chunks of plastic from the holder melted onto it that I knocked off but it still looks perfect inside and it still works fine. The cases are fairly thick and the PCM is pretty tough both mechanically and electrically.
You also posted that there was a MAF code. You need to check out the wiring harness. I would pay close attention to the harness between the MAF and the back of the engine. Many people have had bare wires in the harness on top of the engine rub on the fuel rail or other brackets causing shorts which make the car act-up. You have to un-wrap the whole harness and examine each wire from end to end to check them right.
I could try your PCM in my 98, but my car is put away for the winter and it's staying where it is until spring.
You also posted that there was a MAF code. You need to check out the wiring harness. I would pay close attention to the harness between the MAF and the back of the engine. Many people have had bare wires in the harness on top of the engine rub on the fuel rail or other brackets causing shorts which make the car act-up. You have to un-wrap the whole harness and examine each wire from end to end to check them right.
I could try your PCM in my 98, but my car is put away for the winter and it's staying where it is until spring.
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
YES & NO!!
The PCM needs to have an operating program and tune Flashed into it for your year car.
Then,, It needs to be LINKED to the BCM. Its called a hand shake to satisfy the security protocol.. You can do it with a TECH2 or in an emergency, follow this procedure:
BCM/PCM RELEARN PROCEDURE
You will need to conduct the PCM/BCM relearn process. This matches their handshake ID's and allows them to talk to each other.
Do this before you worry about VATS issues:
1. Turn on the key for 11 minutes.
2 Turn off the key for 30 seconds.
3. Repeat 1&2 two more times.
4. Turn on the key for 30 seconds.
The car should start and run with the new BCM. Good luck and report back on your progress.
Shirl
SD Racing Enterprises
Aguila, AZ
Coutersy of MrEracer
Bill Curlee
The PCM needs to have an operating program and tune Flashed into it for your year car.
Then,, It needs to be LINKED to the BCM. Its called a hand shake to satisfy the security protocol.. You can do it with a TECH2 or in an emergency, follow this procedure:
BCM/PCM RELEARN PROCEDURE
You will need to conduct the PCM/BCM relearn process. This matches their handshake ID's and allows them to talk to each other.
Do this before you worry about VATS issues:
1. Turn on the key for 11 minutes.
2 Turn off the key for 30 seconds.
3. Repeat 1&2 two more times.
4. Turn on the key for 30 seconds.
The car should start and run with the new BCM. Good luck and report back on your progress.
Shirl
SD Racing Enterprises
Aguila, AZ
Coutersy of MrEracer
Bill Curlee
The PCM is tied to the VIN of the car it came out of you would have to reflash the test PCM with the suspected cars VIN and this takes credits from the software like EFI Live or HP tuners.
Burning Brakes
Joined: Oct 2007
Posts: 1,093
Likes: 33
From: Morristown TN
this guy has one for a 98
I am not sure it will work I am sure one of the more knowledgeable members can let you know. I ran across the link when looking for tips to track down my problems
he asking $90
http://ls1tech.com/forums/parts-classifieds/1685438-98-ls1-valve-covers-stock-cam-stock-underdrive-pulley-98-ecu.html
I am not sure it will work I am sure one of the more knowledgeable members can let you know. I ran across the link when looking for tips to track down my problems
he asking $90
http://ls1tech.com/forums/parts-classifieds/1685438-98-ls1-valve-covers-stock-cam-stock-underdrive-pulley-98-ecu.html
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
Sorry Bill, but you cannot swap PCM's from the same year car and expect them to work.
The PCM is tied to the VIN of the car it came out of you would have to reflash the test PCM with the suspected cars VIN and this takes credits from the software like EFI Live or HP tuners.
The PCM is tied to the VIN of the car it came out of you would have to reflash the test PCM with the suspected cars VIN and this takes credits from the software like EFI Live or HP tuners.
Umm, no. That's what the VATS re-learn is for.
Might need to program it to set it up for the car (auto vs manual bin for example), but that's completely different then programming the VIN.
Thread Starter
Heel & Toe
Joined: Nov 2013
Posts: 19
Likes: 0
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Google GM Tech2
http://www.careucar.com/wholesale/gm...scanner-c.html
Its GMs ultimate diagnostic tool and enables the tech to communicate with the PCM, BCM and see what ALL the electronics in the electrical system are doing. You can also reprogram the BCM with it.
Its very complex and does a LOT of stuff. It is able to turn ON & OFF all the bidirectional controls Example: You can turn on and off the cooling fans or the lights with this unit. It connects to the system thru the OBDII port.
With a CAN D adapter module, you can communicate with C6 vehicles.
Hope this helps.
BC
http://www.careucar.com/wholesale/gm...scanner-c.html
Its GMs ultimate diagnostic tool and enables the tech to communicate with the PCM, BCM and see what ALL the electronics in the electrical system are doing. You can also reprogram the BCM with it.
Its very complex and does a LOT of stuff. It is able to turn ON & OFF all the bidirectional controls Example: You can turn on and off the cooling fans or the lights with this unit. It connects to the system thru the OBDII port.
With a CAN D adapter module, you can communicate with C6 vehicles.
Hope this helps.
BC
Drifting
Joined: May 2007
Posts: 1,544
Likes: 208
From: Huntersville, NC
Thread Starter
Heel & Toe
Joined: Nov 2013
Posts: 19
Likes: 0
Ok guys thanks for all the responses. I'm planning on going back over this thread and the PMs and decide my next move. I still haven't been able to locate a used one.
I took mine apart, everything looks fine, didn't see anything burnt or melted.
Whats the easiest way to post pics?
I took mine apart, everything looks fine, didn't see anything burnt or melted.
Whats the easiest way to post pics?
Drifting
Joined: Nov 2011
Posts: 1,401
Likes: 141
From: Summerville South Carolina
I got mine for
Ok guys thanks for all the responses. I'm planning on going back over this thread and the PMs and decide my next move. I still haven't been able to locate a used one.
I took mine apart, everything looks fine, didn't see anything burnt or melted.
Whats the easiest way to post pics?
I took mine apart, everything looks fine, didn't see anything burnt or melted.
Whats the easiest way to post pics?
Dave