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Ford introduced the 4.6 liter engine in 1962 in the Ford Fairlane. It was a replacement engine for the 5.0 liter Windsor engine.
WHITE SMOKE is engine coolant / antifreeze burning. That is due to a head gasket leaking on the 5.7L 350 engine.
Start by replacing the Engine Coolant Temperature Sensor
The starter is out?
Usually an intermittant no start is caused by a fualty Crankshaft Position Sensor. Best way to verify this is to check for spark during a no start situation. If you have no spark at the coil towers then your CPS is bad and needs to be replaced
I would start by calling the dealer.
could be the fuel pump, numberous amounts of sensors, or your coil , first I would check the fire then see if its getting gas if it is its a sensor or timing chain or belt
The fuel injection is not getting gas. Fix or buy a new fuel injection pumb.
vapor lock
Timing needs adjustment is the most likely cause.
Your question is sort of backwards, perhaps you meant what causes engine failure? Engine failure causes...the engine to fail. If someone told me their engine failed I would take it to mean that it stopped running, or wouldn't start.
Maybe, but not likely.