450 fse 2004 help no start

[flam66]

Thanks for your help so far guys,
I must admit it does seem like cam timing,
Tooth 7 lines up with sensor, should I line the front of the tooth with the centre of the sensor to be precise?

image.jpg

Does this look correct I make it 14.5 pins between marks,
Lobes pointing 10 and 2 o'clock,
Could the chain be stretched? It has a manual tensioner with about 10mm of travel left.
The spark plug only looks wet when starting with wide open throttle?

Cranking voltage 11 volts
Cranking about 300 rpm according to guzzidiag
All parameters reading, all seems correct compared to 1 on the forum.
Cleaned every connector today in the loom,
Will go and check Ecu pins.
Is it possible for the cam chain gear on the crank to slip?
Thanks again