Questions about OBD1 - OBD2

[tiffanyxann]

Most people use a chipped OBD1 ECU in their B20 swaps, and that's what I did, but now I'm beginning to wonder...

Is there a particular reason why this might be better than sticking with my stock OBD2 ECU or does it really even make much of a difference?

Also, with the OBD1 ECU, I never passed a smog. Is that fixable with that ECU? That may be the factor to keep me with my stock OBD2..

 

[tiffanyxann]

a few people out here just say to use the stock one.

 

[monotech]

You won't pass smog with a Obd-2 to Obd-1 conversion cause the smog dyno doesn't read the ecu when converted to Obd-1. The good thing is that you use a ecu obd-2 to obd-1 jumper harness which is plug-n-play which you can always disconnect and plug your Obd-2 ecu back in for smog test. I have a B20 v-tec swap in my 97 ek hatch and I converted it to Obd-1 ASAP cause you have more tuning options and less sensors to deal with.