Thanks for offering me the DRBII Mark. I am not sure if I need it anymore though. I was fiddling with the Montero and tore the intake down and reseated the fuel rail. After about 3 minutes of running the Check Engine light blinked off and the engine smoothed out. Still shakes a bit, but its almost like it should be running. <img src="/forums/images/graemlins/kewl.gif" alt="" /> I still have the shaking to deal with, and a mystery coolent leak has shown itself. Also a few corrosion gremlins are needed to be dealt with. But aside from that its running like it should... I was wondering if the ECU on the 89 Montero had a memory on it that would store an error code and keep it running poorly for a while after solving the problem?