jamison
Active member
I have a 90 coupe with a 4 speed automatic. when it is at about 180 degrees or under the car runs fine, i can hit on it and it just accelerates up to speed with no problems. However when it gets up to 210 degrees and above it becomes very hesitant when i give it some gas. I can put my foot to the floor and it seems like i am only resting my foot on the pedal, but after a couple of seconds the SES light comes on and then the car takes off like it should at full open throttle. Along with this hesitating take off there is this loud rattle noise coming from under the car near the engine that does not happen when the car is under 180 degrees. As of right now i have not been able to look into the problem but i think it could possibly be the Throttle Positioning Sensor (TPS), Manifold Air Temperature (MAT) sensor, Coolant Temperature Sensor, or something from the fuel system. As far as the rattle possibly the exhuast or emissions. PLEASE HELP!