NHTSA Complaint #10564178 — 2012 FORD F-150

SINCE NEW MY FUEL MILEAGE HAS BEEN DECLINING AND I WAS EXPERIENCING A SHUDDER, WITH NO CHECK ENGINE LIGHT (CEL). DEALER PERFORMED A TSB AND REPLACED THE CHARGED AIR COOLER AND REPROGRAMMED THE PCM. THIS LEFT ME WITH WORSE MILEAGE AND A NOTICEABLE LOSS OF POWER. THIS PROGRESSED UNTIL 1-19-14 WHERE I LOST ENGINE POWER AND THE ENGINE BEGAN TO SHUDDER WHEN TRYING TO ACCELERATE TO PASS A SLOWER MOVING CAR. WHEN I FLOORED IT, THE TRANS SHIFTED DOWN TO 2ND, AND THE ENGINE SHOOK AND THE TRUCK SLOWED. ONCE I LEFT MY FOOT OFF THE GAS, AND COASTED FOR 30 SECONDS, IT RETURNED TO NORMAL, UNLESS I FLOORED IT AGAIN. NO CEL WAS OBSERVED UNTIL THE NEXT DAY ON THE WAY TO THE DEALER. THEY REPLACED ALL 6 SPARK PLUGS DUE TO FOULING. I THINK THERE IS WATER INGESTION ISSUE AND THAT IS WHAT CAUSED THE PLUGS TO FOUL. MY CONCERN IS THAT IF I HAD BEEN IN FRONT A FAST MOVING VEHICLE, I MAY NOT HAVE BEEN ABLE TO ACCELERATE AND GOTTEN REAR ENDED. *TR