ok i pulled the motor out of my 87 camry and replaced it with a 91 motor, had to change two sensors on the coolant tube, prolly temp sensors and the cars done, i tryed starting the car and it will not run, i thought i might have a vacumm leak but i problably dont, i put starting fluid in the throttle body and the car will start, the car will not idle though. any suggestions? i can hold it at 2 grand no problem as soon as it drops under like 1500 it runs like crap and will not stay running.. is there any difference between these motors? any reasons why the new engine is not running right, engine ran great when i pulled it from the 91 with the bad tranny..