I grounded the boost sensor some time last year and the car started running fine again. When I got home from school recently it started dieing at 3800 again. the secondaries engage when the car is cold but once it gets up to operating temp it starts acting up. My thought was a bad boost sensor, what do the rest of you think? and if that truely is the problem, what does the sensor cost?
Thanks,
Chris

 

Try grounding the ECU properly. As well, run 4 gauge to the engine block from the firewall.

 

This thread may help.