OBD-I Upgrade to OBD-II????
 

Hey I got a question....& I'm pretty sure its not possible. Got into a debate with my friend stating that it's possible to upgrade OBD-I to OBD-II & I know its not possible unless you change out your ECU or something.

Answers please...Thanks

Even if you switch the ECU to a OBD2 ECU(which would be a wiring disaster), the sensors the OBD2 ECU would be looking for wouldnt exist.

So I would say no it can't(within reason) be done, and really no reason why you would ever want to do it.

YOU needed to move this to the general tech forum pardner...I Did! ;)

I knew it that it isn't possible....(well it is but its not easy as you think)

You'd basically want the OBD-2 wiring harness along with the OBD-2 ECU. Then you'd have to install the OBD-2 versions of all the sensors on the engine & exhaust. Some of which are mounted differently so you need (for example) an OBD-2 oilpump because that's where the CKF/TDC sensor is mounted.

You'd need a whole different EVAP system because it needs all the sensors & solenoids to check whether your gas tank is airtight.

Pretty soon it becomes easier to sell the car & buy a newer one.