The explorer's gas mileage has dropped in half in the last two months. The tail pipe went from gray to black on the inside. Also it has a slight suction and miss sounding noise from the tail pipe. Have tried a oil detergent for a possible stuck intake valve but after 20 miles after using it, don't think it worked. a little loss of power and a littel jerky when driving
Mar 8, 2010 at 2:14 PM