obd2 and obd1

[Wilshire]

ive got a 97 sol, obd2 and i bought a chipped obd1 ecu. got a harness and installed it. whenever i started it for the first ten minutes or so i heard a really loud buzzing/hissing noise from the cat and it would idle really strangly. then just earlier today i got a check engine light. so i put the stock ecu back in and everything was just fine= no noise or engine light.

I got to thinking. i put an obd1 ecu into my obd2 car, and i left both o2 sensors in.
would that have anything to do with the noise from the cat and the check engine light???

if so should i remove the 02 sensor before or after the cat? and what should i use to plug the hole the sensor comes out of???

THANKS

if thats not the case i think i got JACKED on this ecu

 

[jamesA]

Go to autozone and have the CEL checked, the OBD1 ECU isn't going to look for the second O2.

 

[Wilshire]

damn thats not what i wanted to here lol

thanks

 

[norcalgsr]

Or just check it yourself.. but yeah you'll need the code(s) from the ECU before you can really determine anything.