What are the differences between the 99-00 pcm's and the 01-02 pcm's?
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What are the differences between the 99-00 pcm's and the 01-02 pcm's?
I have noticed in tuning a couple of cars (with LS1 Edit) that the cars that are 01-02 idle extremely well with big lift cams compared to the 99-00, (or maybe it is just me). I have also noticed there are more information in the factory tables (01-02) than there is in the (99-00) tables. I was having the hardest time trying to get the surging out of a 99 TA and no matter what I tried it would not come out. I then put a 2001 pcm in the car and tuned it the same way I did the 99 and the car idles perfectly.
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They can, but they won't. When the GM engineers issue an update for your model year that requires a dealer to reflash the PCM, I would assume they started from the last 'good' tune in their files for that model year. They would create more problems than they would solve if they loaded an '02 file into an '00 car.
Last edited by SSpdDmon; 01-03-2007 at 10:26 AM.
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What are the hardware differences?
one has the 512kB cache and the other has the 1024kB cache? Are there fundamental differences between these two? How about processing power, sampling rate, optimization?
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thanks for all of the replies.
Since the 2001 computer ran perfect in this car I have manually copied just about every table (in Edit) (timing tables, VE tables, etc) to the 99 PCM. Still have the surge. I put the 2001 computer back in again and it idles perfectly. There are just not enough tables in the 99 PCM. A buddy of mine works at a dealer and said he could flash the 99 PCM to a 01 PCM as long as I have the VIN number of a 2001.
again thanks for all of the replies.
Since the 2001 computer ran perfect in this car I have manually copied just about every table (in Edit) (timing tables, VE tables, etc) to the 99 PCM. Still have the surge. I put the 2001 computer back in again and it idles perfectly. There are just not enough tables in the 99 PCM. A buddy of mine works at a dealer and said he could flash the 99 PCM to a 01 PCM as long as I have the VIN number of a 2001.
again thanks for all of the replies.
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Originally Posted by c5ls1vette
thanks for all of the replies.
Since the 2001 computer ran perfect in this car I have manually copied just about every table (in Edit) (timing tables, VE tables, etc) to the 99 PCM. Still have the surge. I put the 2001 computer back in again and it idles perfectly. There are just not enough tables in the 99 PCM. A buddy of mine works at a dealer and said he could flash the 99 PCM to a 01 PCM as long as I have the VIN number of a 2001.
again thanks for all of the replies.
Since the 2001 computer ran perfect in this car I have manually copied just about every table (in Edit) (timing tables, VE tables, etc) to the 99 PCM. Still have the surge. I put the 2001 computer back in again and it idles perfectly. There are just not enough tables in the 99 PCM. A buddy of mine works at a dealer and said he could flash the 99 PCM to a 01 PCM as long as I have the VIN number of a 2001.
again thanks for all of the replies.
the hardware itself is identical between 99 and 02 fbodies... the OS itself is diffrent.
you can flash a 99/00 PCM to have the same OS as a 01/02... and the reverse is true too, if for some reason you wanted to go back...