There are 11 stored owner reports matching the speed control & cruise leading-label group for the 2000 Mercury Grand Marquis in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 11 of 11 matching reports.
Open the full vehicle complaint log (all categories)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.
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.
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. *TR
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*TR
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.*AK
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.*AK
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.*JB
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.
CONSUMER STATES HAVING PROBLEM WITH THE VEHICLE GAS PEDAL WHICH IS BELOW THE BRAKE PEDAL ABOUT TWO INCHES. MAKING A FRACTION OF SECOND YOU CAN CONFUSE THE GAS OR THE BRAKE PEDAL. DEALER HAS INSPECTED THE VEHICLE AND COULD NOT DUPLICATE OR CORRECT THE PROBLEM. PLEASE PROVIDE FURTHER INFORMATION. TS
WHILE CRUISE CONTROL IS ACTIVATED IT WILL TURN OFF UNEXPECTEDLY. IN ONE CASE TROTTLE OPENED AND DRIVER HAD TO TURN OFF VEHICLE, WHICH ALMOST CAUSED A CRASH. *AK THE CRUISE CONTROL FAILED TEN TIMES. *YH
WHILE BRAKE PEDAL WAS DEPRESSED TO THE FLOOR AND WITHOUT ANY INDICATION VEHICLE ACCELERATED, TRAVELING AT RATE OF 40 MPH, AND HIT A TREE. DEALER HAS BEEN NOTIFIED. PLEASE PROVIDE FURTHER INFORMATION. *AK
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.