I just picked up the car from the Mitsubishi Service Dept. here in Madison WI. The car has a brand new 420a motor in it-the problem is the car barely stays lit at IDLE. Sounds rough and runs rough. I disconnected the negative for 1 minute in hopes this would reset the ECU but, doing this didn't do a thing. Any suggestions?

 

take it back to the dealer and tell them do finish the job. you should have to pay for a motor that doesnt run right