67LS3

a friend of mine bought a 95 camaro lt1 from a guy and he said the harness is from a buick roadmaster. how can i tell if the harness/ecm is obd1 or obd2? i am gm certified on obd2. my internet searches dont get much info. this swap is going into a 72 blazer with t-350 trans. i can modify the harness and tune the ecm with my efilive(if obd2 with later aldl connector. i havent looked at his buy but let me know.

ss.slp.ls1

iTrader: (36)

What year Roadmaster?

Does the harness have 4 oxygen sensor plugs or two?
Does it have a cps sensor plug?

67LS3

i talked to the guy he bought it from. the harness is from a 94 roadmaster and the ecm is a 95 camaro.

ss.slp.ls1

iTrader: (36)

'94 roadmaster is OBD1. PCM is OBD1 also.

Even if you did swap to a OBD2 wire harness and PCM, I was unaware that EFILive had software available that was compatible with LT1 OBD2 PCM's.

You could always get a custom wire harness made to utilize the LS1 PCM and coil packs. Then you could tune it with your software.

67LS3

thanks. you are exactly right. made me think. efilive wont do that.

67LS3

when i type a vin for a 94 roadmaster lt1 and a 95 camaro lt1 in my snap-on scanner why does it tell me to use my obd2 connector?

goldmecham

iTrader: (1)

93-94 had the obd1 with the obd1 port under the dash. 95 had obd1 with a obd2 port under the dash

ss.slp.ls1

iTrader: (36)

Correct. You have to use a OBD1 scnner, like this:

http://shbox.com/1/xraycable.jpg