:cries: Idle Speed surging up and down HELP
I had my car serviced at a car wash. Lube, Oil, and Filter. They told me the Air cleaner was dirty so I had them put a new one in. When I got the car back, the idle was going nuts. Car starts fine, but idle never goes below 1,100 rpm, and goes straight up to 2,100, then right back to 1,100, and back to 2,100…. And it keeps doing it. Wither the car is hot or cold. Car runs fine on the road, but will not go below the 1,100 rpm. I have researched the posts but found no help. I did check vacuum lines. Can’t find any loose ones. Can’t find any vacuum leaks. I tried “taping” on the Mass Airflow Sensor, the throttle body and so on. All to no help. I did find out that before they gave the car back to me they forgot to plug the connector back into the Mass Airflow Sensor before starting the car, but then plugged it in. I also found out they “Spilled” oil on the engine so the washed it of with engine cleaner and low pressure water. Help… I do not have a clue as to what to do. Car wash guys say nothing they did caused this. But car was fine when I drove in. Help. Thank You.