PCM HELP ASAP 98to99
PCM HELP ASAP 98to99 can you convert a 98 pcm to a 99 is it a direct plug in i herd the prossesor is twice as fast let me know because i might need to change a tuner order if this will work
thanks joe
thanks joe
Originally Posted by joe'sls1
can you convert a 98 pcm to a 99 is it a direct plug in i herd the prossesor is twice as fast let me know because i might need to change a tuner order if this will work
thanks joe
thanks joe
The connectors plug in, but the pin out is different. You have to swap several wires around in the connectors.
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Originally Posted by Ed Wright
The connectors plug in, but the pin out is different. You have to swap several wires around in the connectors.
You have to switch the wires around but it can be done. 
I'm just finishing up this exact swap. Here's some good information.
https://ls1tech.com/forums/pcm-diagnostics-tuning/711711-98-formula-pcm-99-pcm.html
http://forum.efilive.com/showthread.php?t=4964
http://www.ls2.com/boggs/torques/98pinpcm.htm
http://www.ls2.com/boggs/torques/99pinpcm.htm
https://ls1tech.com/forums/pcm-diagnostics-tuning/711711-98-formula-pcm-99-pcm.html
http://forum.efilive.com/showthread.php?t=4964
http://www.ls2.com/boggs/torques/98pinpcm.htm
http://www.ls2.com/boggs/torques/99pinpcm.htm
Sevral = ~ 153/160 pins. Then there is the fuel indication, if you are using EFI Live you can correct it with the software. Bottom line, this is not a plug and play type situation. Lot's of folks (not necessarily in this thread)reguratating (false) info on this subject, very few with actual hands on experience and success. It can be done and is well worth the effort. Good luck.
