Easiest way to tell OBD1 OR OBD2

[NaborsgS14]

I have a auto 95 240sx se that has a decent amount of body dmg that im swapping into another 95 shell the shell is a manual with the wireing harness and ecu what is the easiest way to tell if the engine i have is set up for obd1 or obd2 or doest just the engine matter... I want it to be pretty much a direct plug and play kinda deal dont wanna have to do any rewireing

[fiznowler]

If you are just swapping the engine and it is an s14 motor to s14 chassis it should be plug and play. There are some differences but they would be on the chassis harness and the car is already set up for it. Just use the harness and ecu that is for the good shell and the motor from the wrecked shell. You should be good to go.

Don't forget you have to take out the bearing adapter on the back of the auto motor and put in a pilot bushing!!!!!!

[NaborsgS14]

So let me double check ob1 or obd2 auto 95 engine to a 95 shell with obd2 wire harness and ecu set up im fine cause if so im goin to buy the shell today

[fiznowler]

Take a look at the ecu plugs to double check they are the same. If the ecu plugs are the same than you are the same obd. If it isn't the same obd it will still work just may have a few small things to change. If the shell is a good buy then by all means buy it and sort out the small stuff later.

[OutToWinPAHC]

Best way, the number on the ECU..... But it should be OBD1

[mixeds14]

95 is obd1, 96 n up are obd2.... but both have the same color ecu plug..........(white)... also the ob2 has two O2 sensors, one at the header is a 3 wire, the other is b/f the cat its a skinny one wire sensor n the obd1 has 1 O2 at the header n its two wire sensor...

[Taylor008]

Late month 95's are OBDII. ECU is easiest way to tell if the motor is out of the car.

Otherwise look at the CTS. If it's red, it's OBDI. If it's blue (I believe?) then it's OBDII. (This is on a stock KA)