93 to 94 LT1 Conversion, No Comunication Through Diagnostic Port

liv2race · 08-12-2007, 10:57 PM

I converted my 93 Trans am to my 94 Camaro LT1 engine and tranny. The motor runs no problem. However I can not get my laptop to communicate with the T/A through the Diagnostic Port. It has the same color wires going into the OBD1 diagnostic port as the camaro, but no communication. Note I did switch to a different laptop since I had programed it in the camaro. So my question is:
Is the problem with the laptop, or can I not use the 93 port and wireing harness. Note the 94 and 93 connectors on the Passenger side floor were a plug and play.
Also Tuner Cat says it has not communication. The Commlog says connected but gives no information
Thanks

TURBO383WS6 · 08-13-2007, 08:25 AM

make sure you laptop is setup to read from the port you are using. had the exact same problem w/ mine trying to read the FAST system.

liv2race · 08-13-2007, 10:26 AM

I will check again today, I think it may be the USB adapter. It looks like all of the OBD1 serial ports use the same data communication wire
Thanks

86zboss · 08-13-2007, 11:32 AM

what is the differnce between 93 and 94?

liv2race · 08-13-2007, 08:23 PM

As far as the diagnostic port I do not know, that is why I am asking. PCM is different, which I am sure you know.

Revelation Z28 · 08-13-2007, 08:25 PM

93 is full speed density as opposed to 94 having both SD and MAF.

93 did not have any T top models

infinitebird · 08-13-2007, 08:43 PM

Quote:

Originally Posted by Revelation Z28

93 is full speed density as opposed to 94 having both SD and MAF.

There are many more differences too.

The auto trans is electronic in 94, not in 93.

93s are batch fire, 94+ is sequential.

The brakes are slightly different.

The speedo/dash/wiring is different.

there's more, etc

Revelation Z28 · 08-13-2007, 08:49 PM

Quote:

Originally Posted by infinitebird

There are many more differences too.

The auto trans is electronic in 94, not in 93.

93s are batch fire, 94+ is sequential.

The brakes are slightly different.

The speedo/dash/wiring is different.

there's more, etc

i wasnt gonna sit here for 15 min thinking. thoes are off the top of my head

liv2race · 08-14-2007, 01:18 AM

So what do I need to change? Is the 93 wiring harness inside the car compatable with the 94 computer and tuning?

will62085 · 10-13-2009, 11:51 PM

Quote:

Originally Posted by liv2race

So what do I need to change? Is the 93 wiring harness inside the car compatable with the 94 computer and tuning?

Bring one back from the dead here...

Did you ever figure this out? I'm wondering the same thing...