lilbuddjr

Yep and I even used the same o2 sensor that was in the stock 1.5 and worked fine. Just had to cut the plug and rewure it into the 4 wire plug

Mindless

Check cam timing.

Fabrik8

So you still have the O2 sensor CEL. Which O2 sensor are you using, and what is it supposed to be for that ECU? If you're using a 1-wire, and the ECU wants a 4-wire, you're going to have problems. This should be an easy thing to fix, so I don't quite understand what you're doing here..

lilbuddjr

i have the rywire harness and for the o2 hookup it has the 4 wire plug with only one wire in it not 4. so i took a 4 wire o2 sensor i had layin around an cut the sensor off and wired the 1 wire o2 sensor onto the plug in the same spot as the wire on the engine harness

lilbuddjr

The o2 sensor I used was on my stock motor with no codes. But either way ive never heard or seen a o2 sensor make a car kick and jump like mine does