Originally Posted by kenshiro
Your tune is probably off. How did you tune it? You probably need to lean out the A/F.
you're probably right, since it is running way rich and sometimes gets misfires from it...but i don't dare tune A/F until i get a wideband o2. i just don't trust the front o2 sensor that the ecu and utec work off of. i really need to get a dyno tune done, but cash flow right now is a problem. i have the timing stacked out pretty well in the low and high ranges and midrange has a little bump, mostly to eliminate large jumps between timing values. again, don't wanna get too radical with that either without a good dyno tune. would be nice to find someone that already has done a dyno tune for their utec on a similar setup.