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PCM problems, GT to GTP

S

saleenprix

New member
The car is finished, all i need now is a PCM.
I bought one off a GTP and put in it my car and the fuel pump will not prime.
I put my old PCM (GT) back in, the fuel pump works fine.
It obviously isnt my fuel pump. Is there a difference in the pins on the PCM?
This has been tested on 2 different pcms.

Im so LOST:confused:
 


you need a combination of the two PCM's else your car wont run.

do NOT drive it with the GTP pcm because your tranny tables will be very off.

unless you swapped transmissions as well.

What year is your car and what year is the GTP PCM that you have?
 
matt5112 said:
you need a combination of the two PCM's else your car wont run.

do NOT drive it with the GTP pcm because your tranny tables will be very off.

unless you swapped transmissions as well.

What year is your car and what year is the GTP PCM that you have?
Click to expand...

Car is a 98 and the pcm is a 98 too as far as i know.
 
I've heard you need to start with the GTP bin file and change stuff around...at least that is how it worked on Gafford's car...
 
bluegtp91 said:
I've heard you need to start with the GTP bin file and change stuff around...at least that is how it worked on Gafford's car...
Click to expand...

im getting a friend over in a few hours, im going to try his PCM and if it doesnt work then, i know its a problem with my car.
 


seems like i ended up with a PCM from a pre 98 car. its the huge bulky looking one. the one from the GT is flat looking. will anything post 98 work?
 


Easier to do that on an SSM90 kit...there are problems run into using a GT PCM, such as not having parameters in the PCM for boost...or so I've heard...but I don't know...I don't tune.
 
bluegtp91 said:
Easier to do that on an SSM90 kit...there are problems run into using a GT PCM, such as not having parameters in the PCM for boost...or so I've heard...but I don't know...I don't tune.
Click to expand...

Nah you can load it in for a l67 map. No issues I can see. might have to unhook the BBV and just let it operate with vacuum. Thats about it. I run a l32 map in mine FWIW
 


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