BigzXJ

Okay just have to say this site is Awesome. I have spent several hours learning from here. But I guess I need to learn some more. I have been trying to figure out some bugs in my 90 Cherokee and I have a friend with a 91. His production date is 06-90. Both should have a renix system right?? If so, I was looking at his wires that run across the intake and followed them to the ones that go to the O2. Sensor/knock/temp. Sensor. HIS ARE NOT PLUGGED IN TO THEM AT ALL. His purrs like a kitten compared to mine. I thought the renix needed all of these to run right. Any ideas??

WantACherokee

As far as I know when you're talking about Renix vs. H.O. it's the model year you go by rather than the production date, so his should be an H.O. My '91 has a production date somewhere around mid 1990 and it's an H.O.

Now if he's got sensors that aren't plugged in, that's odd no matter what...

TheJerm

The HO doesnt really 'need' O2 sensor, knock or temp sensors. The O2 is nice to have decent gas mileage.

BigzXJ

Okay I was wrong on the O2 sensor. His was plugged in but not very good. And yes his is an HO the cast on the block is 0630 so if I remember right its a 97-99. In my 90 I dropped a 95 4.0 in her. But I thought the "renix" brain needed all of these sensors in order to run properly.