Have you considered the Throttle Position Senson? It is cheap to replace.
I have one on order for my 95 V6 ATX that has been having problems like this for many months. I have replaced the plugs, wires, coil pack and oxygen sensors, checked the EGR system and verified it being clean and functioning. The problem always goes away (for up to two weeks) and then always comes back again.
I will fill this forum in on whether this works or not but my theory is that the TPS can read incorrectly making the engine think the car is decelerating instead of accelerating. This would mean the engine is leaned out instead of getting more gas.
I guess it could also be the wiring. Hopefully not.
- Randall
