I own a '99 Saturn SW1 that has a fast idle problem. Hot or cold, when the car is moving the engine wants to idle at ~1800 RPM. I’ve taken it to my local mechanic. He cleaned the throttle body and unplugged the computer in an attempt to reset the idle to no avail. now he tells me that he thinks this is “normal behavior” for this car…but somehow being able go 20 MPH while the car is idling just doesn’t seem right ;-). Thanks in advance for your suggestions!
Try to check for vacuum leaks