NHTSA Complaint #10966046 — 2011 FORD F-150

EXPERIENCED MULTIPLE ENGINE MISFIRE EVENTS IN PAST YEAR WITH 3.5L ECOBOOST ENGINE. DEC 2015- MISFIRE CODE P0300. SIX SPARK PLUGS REPLACED BY NAPA CERTIFIED SHOP AT MY COST. AUG 2016 - TOWING 7,000 LB. TRAVEL TRAILER - ENGINE STUTTER & POWER LOSS GOING UPHILL, CHECK ENGINE LIGHT CAME ON. TOOK TO LOCAL FORD DEALER. DIAGNOSIS - CRACKED SPARK PLUG ON CYLINDER 6. SPARK PLUG REPLACED AT MY COST. DEC 2016 - UNDER NORMAL HIGHWAY DRIVING CONDITIONS. ACCELERATED FROM 65 TO APPROX 70 MPH TO PASS SEMI - ENGINE STUTTER & POWER LOSS. CHECK ENGINE LIGHT CAME ON & TRUCK BEGAN TO SHAKE, ENGINE WENT INTO LIMP MODE. HAD TO PULL OVER & SLOW TO 50 MPH BEFORE POWER CAME BACK. TOOK TO LOCAL DEALERSHIP. DIAGNOSIS - FOULED SPARK PLUG & BAD IGNITION COIL ON CYLINDER 3. COIL REPLACED UNDER WARRANTY, SPARK PLUG REPLACED AT MY COST. FEB 2017 - UNDER NORMAL HIGHWAY DRIVING CONDITIONS. AGAIN ACCELERATING FROM 65 TO APPROX 70 MPH TO PASS ANOTHER VEHICLE - ENGINE STUTTER & POWER LOSS. CHECK ENGINE LIGHT CAME ON & TRUCK BEGAN TO SHAKE, ENGINE WENT INTO LIMP MODE. HAD TO PULL OVER & SLOW TO 50 MPH BEFORE POWER CAME BACK. TOOK TO SAME LOCAL DEALERSHIP. DIAGNOSIS - CRACKED SPARK PLUG & BAD IGNITION COIL ON CYLINDER 6. COIL REPLACED UNDER WARRANTY, SPARK PLUG REPLACED AT MY COST. MARCH 2017 - AGAIN, UNDER NORMAL HIGHWAY DRIVING CONDITIONS. AGAIN ACCELERATING FROM 65 TO APPROX. 70 MPH TO PASS ANOTHER VEHICLE - ENGINE STUTTER & POWER LOSS. CHECK ENGINE LIGHT CAME ON & TRUCK BEGAN TO SHAKE, ENGINE WENT INTO LIMP MODE. HAD TO SLOW TO 45 MPH BEFORE POWER CAME BACK. TOOK TO SAME LOCAL DEALERSHIP. WAS TOLD THAT I WAS NOW 200 MILES OUTSIDE OF EXTENDED WARRANTY. THEY WOULD LOOK AT IT BUT IT WOULD COST ME. TOOK TO AUTOZONE FOR CODE READ - ERROR CODE P0305 - CYLINDER 5 MISFIRE. MULTIPLE ARTICLES & ONLINE FORUM REPORTS OF THIS ISSUE. FORD APPEARS TO BE IGNORING THE ISSUE.