I have a 1999 mercury grand marquies . The check engine light came on i checked the gas cap and all the fluids all thats fine. Now it won't stay ideling andif you try to drive it you must keep you foot in the brake and gas at the same time if you let off the gas it tries to die and sometime it does i use shell gas only have any ideas on the problem?
Jan 23, 2006 at 11:19 AM