2001 INFINITI I30. ELECTRONIC MOTOR MOUNTS FAIL, CAUSING CASCADING FAILURE OF IDLE AIR CONTROL AND DESTROYING ECU. ALTERNATELY, THE IDLE AIR CONTROL VALVE FAILS AND DESTROYS THE ECU WHICH IN TURN DESTROYS THE ELECTRONIC MOTOR MOUNT CIRCUIT WHICH RESIDES ADJACENT TO THE IACV CIRCUIT ON THE ECU MAIN BOARD. THE RESULTING SHORT CIRCUIT IN EITHER CASE CAUSES ACRID SMOKE TO ENTER THE PASSENGER CABIN OF THE CAR AND CAUSES THE ENGINE TO REV WILDLY WHICH, IF NOT, ACCOUNTED FOR, COULD CAUSE AND AN UNSAFE SURGE FORWARD IF STOPPED. BY EMPIRICAL INTERNET RESEARCH AND MORE IMPORTANTLY - FROM DISCUSSIONS WITH THE DEALER SERVICE TECHNICIAN, THIS IS A PROBLEM EXPERIENCED BY SEVERAL DRIVERS/OWNERS OF THE 2001 INFINITI I30, AND 2001 NISSAN MAXIMA WHICH ARE "SISTER" CARS. THIS REPAIR IS VERY COSTLY REQUIRING A NEW ECU, IACV AND ELECTRONIC ENGINE MOUNTS PLUS THE COST OF REPROGRAMMING THE CARS IDLE LEARNING CURVE - TYPICALLY RANGING BETWEEN $2000 AND $3500. THE MFR KNOWS OF THIS ISSUE BY THEIR DEMONSTRATED "PROCEDURE" FOR REPLACING THESE PARTS. *TR