obd1 vs obd2 tuning
Thread Starter
Launching!
Joined: Mar 2022
Posts: 247
Likes: 32
obd1 vs obd2 tuning Mostly a general question. I cant really seem to find an answer. When my 1994 firebird was obd1, stock pcm, Tuning it I just used a obd1 to usb cable to my laptop, pretty simple, could use any software I wanted. When I got the torqhead kit for my car, its now obd2 and I found that you cant just buy any obd2 to usb cable (maybe you can but The ones that I found were apart of diag tools ?) It seems the only option to tune a car with obd2 is to use a mpvi device, sold by HP tuners. Im curious why is this the case, what is so special about it ? Thanks.
Staging Lane
Joined: Nov 2019
Posts: 60
Likes: 16
You got lucky with the 94. Most odb1 cars used EPROM chips that needed to be removed for programming. Just before 96 a few ECUs where introduced that use flash. Also, the old OBD1 cable was basically just a serial adapter with some level shifting.
