Lesabre Keeps idoling High and stalls when coming to a stop or making a complete stop. The service engine light stays on most of the time then goes off but comes right back on. The battery light plays peek-aboo with me I replaced the Battery and alternator and the light still comes and goes. It idols high and then goes back to regular then idols high again.. I replaced the throttle sensor, its still doing the same thing. Car never cuts off untill you are slowing down to make a stop or you stop completely and then slowly cuts off like you are out of gas. I have taken the car to two different shops so I could get the code reader put on and both places are unable to read anything its like it wont connect???? I dont know what else to do It sounds like possibly there is a vacuum leak somewhere when the engine is rev'd but nobody can find one anywhere I dont know what else to do someone help!?!?!