We just got a 1998 ford escort, automatic with 106,000 mi on it. two weeks passed and the check engine light came on. It was the tps, it was changed n no change. The car turns on after third try, jumps at 20mph, and once in a while turns off at a light.when you put foot on accelerator, the motor seems like it stays accelerated. throttle cable seems too loose but dont know how to tighten it.took apart throttle body cleaned it out, no change, dont know what else to do. can you help!