UPDATE: I have some more info now. It wasn't the throttle switch, it checked out. Originally it would only idle and if any gas was given it would die. After a few tries I did get it to run at a higher RPM. I did notice that the intake tube between the turbo and intercooler collapsed into a pancake when I revved it over 4000rpms (quick throttle from 2000 to 4500 rpms in park). I'm thinking there may be an obstruction somewhere, haven't checked yet. Anyway, I held the RPM's between 2-3000 until it was warm and the problem went away and everything seemed fine. I took it out for a drive and it drove fine, but when under heavy throttle the engine quit again. Felt like there was no fuel getting to the system. I could push the throttle up and down and nothing would happen. After pumping the gas pedal up and down a bunch of times it came back to life and drove fine until I drove under heavy throttle. I've read that there is an overboost cutoff switch that will cut the fuel if the turbo puts out too much boost. I'm not sure if the 1990 has the cutoff switch, I read somewhere that it was controlled by the ECU. Anyway I think my problem it either turbo related, clogged intake somewhere (because of collapsing intake) or as mentioned in another post the Hall Sensor. I have to check if the 1990 has the hall sensor. But with the collapsing intake I'm leaning more towards a turbo problem or clogged intake/airfilter. Any ideas of what could cause this? Thanks in advance