Hey guys I have 06 F150 5.4L with a no start condition. The truck comes from another shop with no improvement. This is whats done so far , replaced plugs, checked the fuel control module 100% ok,we have fuel pressure at the rail, we have injector pulse ( niod light ), we have spark and we have a good battery. We tore down the timing cover because of the sound of engine turning over like it was out of time, when cranking. We did find a tentioner totally destroyed so we replaced the timing assm put it back together and replaced the oil pressure switch because we get this "low oil pressure" in the info center everytime, we also get gray/black puffs of smoke out the tail pipe when turning over.
So to sum it up we have spark,fuel, and battery and still nothing! We even flashed the ecu and still no fire/no start. Please help! Thanks! Feel free to ask any questions.

 

Do you have compression ?

 

I would be chasing timing also. Cps?

 

UPDATE!
We took the valve covers off again and guess what no oil pressure, cams are dry, and it jumped time again. we think the engine is sludged up. Now we are trying to decide what to do next! Any advice folks?