So since I fixed the overboosting issue I thought I better start a new thread. I've read about a lot of people having this issue, seems to be quite common, but I don't know of any definitive answers:
After a couple of minutes with the car running, it seems to cut out like there is no fuel. If you've ever run out of gas, you know what this feels like. This only happens while driving under a slight to moderate load, especially between 2000 and 4000 rpms. It revs smoothly and freely when not in gear, and has never stalled. Also, the problem does NOT happen if I floor it and go flat out. I can take off at wide open throttle and go all out through 3 gears and never a miss, but as soon as I lift the peddle off the floor and hold a steady cruise, it will start cutting and bucking. Makes a pain in the ass cruising on the highway... any ideas? I will troubleshoot the following items in this order, but the $$ will add up so I'd like to know if anyone else has solved this riddle before I get too far in the red with it:
1. just replaced the fuel filter, no change
2. new fuel pump on order, will install this coming weekend
3. replace plug wires (17k miles old)
4. replace cap and rotor (17k miles old)
5. injectors?
6. VAF?
7. O2 Sensor?
8. ECU?
#UPDATE# if you are having these problems, try cleaning the grounds at the thermostat housing including the bracket, connecting bolts, and the top bolt of the thermostat housing first!