Ignition problems of the 2005 Ford F-150

"electronic throttle control" failure causes the engine to lose all power, power steering is inoperable and vehicle must be stopped, ignition turned off and on again before vehicle is able to proceed. This has happened on 4 occasions in the past year with no warning. This defect poses a seriously dangerous situation, especially at highway speeds, as the operator has no control over the vehicle until able to pull to the side, turn ignition off and then restart the engine. Ford service says they are unaware of this problem but, it is reported numerous times in forums on Ford vehicle safety as a $500-$600 repair. This doesn't seem like a normal wear & tear issue but rather a factory defect that Ford should address before someone is injured?.

Purchased a used 2005 Ford F-150 from the dealer ship, truck has 80,000 miles on it. When I changed the plugs 5 out of the 8 broke off in the head.

Driving on the freeway at approximately 70 miles per hour I activated the vehicles' cruise control system. Without warning the vehicles' interior lighting came on and I subsequently noticed that the vehicle had died ( engine, was no longer running). In a panic, I attempted to turn the ignition key with negative results. I cautiously pulled to the shoulder of the freeway, placed the transmission in park and turned the ignition key to the off position. I then turned the key to the starting position and the vehicle started again. This occurred on two separate occasions. An additional issue with the vehicles air conditioning system has happened several times wherein (usually within the first couple minutes of start up) when the air conditioning is turned on, on the "auto" setting, for example at the 60 degree setting on high, the system will intermittently turn off and then turn on displaying 72 degrees, then turn off, maybe back on again etc. , blowing at a much lower speed. Addressed complaints with Ford dealership, however, (as always) they were unable to duplicate problem. Inquired about any service bulletins and informed that there were none. Thank you for your time.

: the contact stated the vehicle's factory key was defective and does not start the vehicle. The vehicle included 3 keys; 2 good and 1 defective. Any time a good key was used to lock the door, the defective key does not work at all when attempting to start the vehicle. The defective key worked if it used to lock the door before starting up. The vehicle was taken to a dealer, who programmed another key, but the problem persisted. The vehicle was brought back to the dealer who expressed that another key could not be reprogrammed because of the way the vehicle was manufactured. The manufacturer was contacted three times and suggested that the vehicle be taken to another dealer. The other dealer could not duplicate the problem, and offered no resolution.