Very common to be a bad crank position sensor
but don't over look fuel pump and do check fuel pressure and fuel flow
mark and switch ASD relay with another relay in the relay box
Crankshaft Position (CKP) Sensor (4.7L) located On right rear side of cylinder block.
Crankshaft Position (CKP) Sensor (5.9L) located On top of cylinder block, near rear of right cylinder head
Tuesday, September 14th, 2010 AT 6:16 PM