2000 Mercury Grand Marquis acceleration problems

Filed May 28, 2019 · Acceleration, Engine · 118,000 miles · FL

Tl* the contact owns a 2000 mercury grand marquis. While driving various speeds, the vehicle hesitated to accelerate. The failure occurred most frequently when traveling up hill. The failure was intermittent and the check engine warning indicator illuminated. The dealer was not notified. The vehicle was not diagnosed or repaired. The contact sprayed carburetor fluid on the intake manifold and noticed a crack. The manufacturer was made aware of the failure. The failure mileage was 118,000.

Filed Mar 4, 2011 · Acceleration · 98,900 miles · GA

Tl* the contact owns a 2000 mercury grand marquis. The contact stated that he was driving with the cruise control activated. As he approached a traffic stop and applied the brakes, the vehicle abnormally accelerated. The contact was accelerating toward traffic and in order to stop the vehicle, he veered off the highway and shut the engine off. He restarted the vehicle several minutes later as it resumed normal operation. The dealer was contacted and advised the contact to bring the vehicle in for inspection. The vehicle was not repaired. The failure mileage was approximately 98,900. The VIN was unavailable.

Filed Feb 23, 2011 · Acceleration, Airbags · 200,000 miles · CA · crash · 1 injury

Tl* the contact owns a 2000 mercury grand marquis. The contact stated that while sitting in an intersection with the brakes depressed, the vehicle abnormally accelerated and lightly crashed into another vehicle. The air bags then deployed abnormally, several moments after the crash occurred. The contact was injured by the air bag and sustained lacerations to his left arm. A police report was filed. The vehicle was inspected by a dealer and they advised that the air bags should not have deployed without a forceful impact. The vehicle was repaired. The manufacturer was contacted and they offered no assistance. The failure mileage was approximately 200,000. Updated 03/29/11 *bf updated 12/28/2011

Filed Nov 10, 2010 · Acceleration · 167,000 miles · FL

2000 mercury grand marquis lunges forward (RPM increase @1000 and loud growl from engine compartment) when approaching a stop light and/or already stopped at a light. Everything returns to normal when I accelerate again, until the next light. This is an intermittent problem but very annoying. There have been no "incidents" from this since I now know to expect it, but I could certainly see an accident occurring as a result of this defect. I am reentering this as I think I marked the incorrect year make on my previous submission. It is actually a 2000.

Filed Mar 15, 2007 · Acceleration · 35,000 miles · NY · crash

Tl* the contact owns a 2000 mercury grand marquis. While driving at various speeds between 5 and 10 MPH the vehicle accelerated on its own and the brakes would not stop the vehicle. To stop the vehicle, the contact had to put the vehicle in neutral. The failure mileage was 35,000. There were no warning indicator lights illuminated. The current mileage was 37,000. The consumer stated that he previously put the car in reverse and it took off he kept braking but the vehicle wouldn't stop and damaged the front end of the car. Update 05/22/07

Filed Aug 8, 2006 · Acceleration, Brakes · 63,196 miles · LA

Dt*: the contact stated when the cruise control was deactivated manually or deactivated by applying brake pressure, there was a loud popping noise. The dealership determined this was by pressure in the cruise control line. The contact expressed this problem was related to brake repair work performed by the dealership.

Filed Jul 12, 2006 · Acceleration · 88,000 miles · IN

Dt*: the contact stated the engine revved for no apparent reason and the check engine light illuminated previously. The vehicle has not be taken to the dealer. The vehicle had one accident about 2.5 years ago when the vehicle hit a deer. The dealer determined then that there were no engine problems after the accident, only damage to the body of the vehicle. The contact expressed that on two occasions while the vehicle was being parked, the engine has surpassed 5000 rpms.

Filed Feb 16, 2005 · Acceleration · NJ

While driving on with the speed control on , the engine abruptly stopped. *bf the ignition key was turned off, which inactivated the speed control, and the engine was started with no problem. *sc the consumer stated there was a smell hot burning wires.

Filed Feb 3, 2005 · Acceleration · 108,161 miles · NC

The vehicle accelerated while on the highway to 60 MPH. The consumer put the vehicle into neutral to slow it down. After taking it to the garage the RPM(s) were completely open. The idle valve was found to be defective and replaced.

Filed Jan 31, 2005 · Acceleration · 30,000 miles · NJ

While driving 70 MPH vehicle stalled. Cruise control was engaged. After waiting for a little while the vehicle was restarted. Vehicle continued to run for a while before it stalled again. Vehicle was towed to a repair shop, and nothing could be found.