dlong83

I have a Cali. Cherokee I just did engine swap on old engine had the 4 o2 sensors on manifold by the cats new engine does not so now the cel is on can I swap harnes and computer or is there more to it then that?

salad

Technically it's illegal since you've removed factory emissions equipment. Check the forum rules regard catalytic converter removal. Not sure if they check what you're supposed to have versus your VIN in your area.

dlong83

No I'm in ohio they don't bother with emissions here the jeep is an 2000 model if that helps

CCKen

Pay attention to Federal laws concerning emissions.

dlong83

Jeep is going to be mostly off road I'm not to worried about the law just want it to run right

CCKen

So you want to convert it from California (+ 50 states) emissions exhaust system to a 2000 XJ Federal emissions exhaust sytem, with only one downstream catalytic converter and two Oxygen Sensors?

What year engine did you use as the replacement engine? What is the cylinder head casting number?

If you want to change to the 2000 XJ Federal Emissions exhaust sytem you'll need:

The entire exhaust system, down to and including, the Catalytic Converter.

A 2000 XJ Federal Emissions PCM.

A 2000 XJ Federal Emissions wiring harness.

Bustedback

Put it back to the way it was, then it will run right. It's jackholes that make statements like yours that make us all look bad.

dlong83

Ok the donor jeep was standard emissions the one I replaced the motor in was Cali emissions and the engine ran great with the standard emissions so I'm asking can I put the ECM out of the donor vehicle in the now running vehicle

dlong83

?