Hi I have a Mercury Cougar V6 and recently the check engine light went on and idle was going high when I press the gas pedal. The rpms go up and down and then come to normal every time I press the gas pedal. I got the car scan and it said the idle air control valve was malfuctioning so I switch it for a bran new one and I still have the same problem but when I disconnect the valve from the cable its connected to the car runs great the rpms stay normal but the check engine light its still on what can I do should I leave the cable plug in or unplug it?
have the same problem?
Wednesday, May 26th, 2010 AT 9:21 PM