Hello, I have a 1999 Mercury Grand Marquis and I have a problem. When started the vehicle runs fine at idle but when it is put into drive or reverse and you go to accelerate the vehicle barely moves and bogs down. As soon as you let off the gas peddle it smoothes out again and then try to hit the gas again it does the same thing again. I have replaced all the catalytic converters, 4 new 02 sensors, fuel filter, air filter, mass air flow sensor, spark plugs, ignition coils, cleaned the fuel injectors checked all fueses and relays, and the fuel presure is good and throttle position switch voltage is good as well and it still does the same thing. It is frustrating. Could it be the traction control acting up? If so where is the traction control modual in the this vehicle vehicle?
have the same problem?
Sunday, May 31st, 2009 AT 12:37 AM