There are 1 stored owner reports matching the fuel system leading-label group for the 2010 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 1 of 1 matching reports.
Open the full vehicle complaint log (all categories)THROTTLE BODY FAILURE__ ENGINE GOES TO DEAD IDLE AT HIGHWAY SPEEDS, LEAVING THE DRIVER AND PASSENGERS HELPLESS TO EXIT ONTO THE BREAKDOWN LANE OR SHOULDER IF YOU ARE NOT IN THE RIGHT HAND LANE WHEN IT HAPPENS, IE IF YOU ARE ON A 70 MPH INTERSTATE IN THE CENTER LANE WITH VEHICLES PASSING YOU ON BOTH SIDES WHILE YOU ARE HELPLESSLY COASTING TO A STOP UNABLE TO REMOVE YOURSELF FROM THE CENTER LANE, YOU WOULD BE SUBJECT TO CAUSE A CHAIN REACTION ACCIDENT. FORD REFUSED TO FIX THIS VEHICLE AT THEIR EXPENSE, AND WANTED TO CHARGE ME $189 DOLLAR FEE TO ANALYSE THE PROBLEM, WHEN THEY ALREADY KNEW WHAT WAS WRONG,(ACCORDING TO THE TECH PERSON I SPOKE WITH WHO SAID THEY HAVE REPLACED HUNDREDS OF THESE DEFECTIVE PARTS) THE PART COST $543 DOLLARS NOT INCLUDING LABOR ON A VEHICLE WITH 71 THOUSAND MILES ON IT. THIS IS AN EXTREMELY DANGEROUS SITUATION AND SHOULD BE RECALLED ASAP
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.