good evening i have a 1987 mercury grandmarquis with 27000 original miles and a 302 and a automatic overdrive transmission. yes the miliage is original. any ways my problem is at certain speeds, usually low rpms my car runs rough (chuggs) ive replaced the pcv valve and the fuel filter along with the plugs. the wires cap and rotor have no signs of wear. any help would be greatly appreciated thanks.
Oct 17, 2007 at 7:59 PM