pcmhacking.net

jamesried wrote: Yeah this is the very first ls1 pcm used in 97-98 vehicles and the dbw 24x coil near plug 7.4 big blocks in big trucks. Similar but very different animal and very hot garbage temperamental.

526b145273546746ae4aabf8f22a3953.jpg

If you use a scantool, does it pull a VIN or anything like that?

Tazzi wrote:

jamesried wrote: Yeah this is the very first ls1 pcm used in 97-98 vehicles and the dbw 24x coil near plug 7.4 big blocks in big trucks. Similar but very different animal and very hot garbage temperamental.

526b145273546746ae4aabf8f22a3953.jpg

If you use a scantool, does it pull a VIN or anything like that?

Yes still pulls VIN, serial, etc. Not sure what part exactly gets corrupted, but it's not a full wipe or corruption. When you get the P0601 code on these the fuel pump won't prime and they act funny.

jamesried wrote:Yes still pulls VIN, serial, etc. Not sure what part exactly gets corrupted, but it's not a full wipe or corruption. When you get the P0601 code on these the fuel pump won't prime and they act funny.

Maybe there is a slave chip.. and that has the information???

Tazzi wrote:

jamesried wrote:Yes still pulls VIN, serial, etc. Not sure what part exactly gets corrupted, but it's not a full wipe or corruption. When you get the P0601 code on these the fuel pump won't prime and they act funny.

Maybe there is a slave chip.. and that has the information???

That is my understanding or something like it. Nothing in the pcm otherwise screams "hey i'm a flash chip" I even opened up the middle and there's nothing inside (it's a weird 2 PCB deal with the ribbon cable between it)

Here's another reply from the guy that supposedly can fix:
https://ls1tech.com/forums/pcm-diagnost ... -what.html

"Vins are in the 98 pcms, Just not in the standard Bin file. They are on an eeprom."

jamesried wrote:That is my understanding or something like it. Nothing in the pcm otherwise screams "hey i'm a flash chip" I even opened up the middle and there's nothing inside (it's a weird 2 PCB deal with the ribbon cable between it)

Whats its VIN? We can lookup what the factory OS/Cals are suppose to be, it might also show a slave OS if it does have one.

Tazzi wrote:

jamesried wrote:That is my understanding or something like it. Nothing in the pcm otherwise screams "hey i'm a flash chip" I even opened up the middle and there's nothing inside (it's a weird 2 PCB deal with the ribbon cable between it)

Whats its VIN? We can lookup what the factory OS/Cals are suppose to be, it might also show a slave OS if it does have one.

2G2FV22G5W2231487

Only lists one calibration module on the TIS site:

9375581 9375573 N/A New calibration to correct the A/C compressor from cycling improperly during heavy acceleration.

Yeah just checked that also. It could be that SPS may download additional files that are not shown in the SPS calibration screen (Which does occur for certain modules such as E38's).

More info from the HPT website. I stupidly flashed his hptuners file to this replacement PCM and probably caused it. Though I've had no issues doing that with other non-hptuners tools (tunercat, efilive, etc) with binaries i pulled from SPS.

https://forum.hptuners.com/showthread.p ... -read-this