You forgot that the optical disk turns a 1/2 crankshaft speed since it is connected to the camshaft. yes, it has 360 slots in it, but the computer turns it into 720 by counting both edges of the square wave signal coming out of it. This gives you 1 degree accuracy with respect to the crankshaft. 180 degrees out of phase is impossible. I did confirm rotor position with my spare optispark I will be using as a signal generator for my circuits.
As to the triton VVT woes.....I was tasked with finding out the real source of the cam phaser problems. The oiling system. Starting with the oil pump, it has an aluminum backing plate that flexes at 1700 rpm or earlier, bleeding off oil pressure. Melling has fixed this problem with a cast iron backing plate. The oil pressure sending unit position only lets you monitor oil pressure right at the pump outlet, not at the upper end. There are orifices in the heads to limit inlet flow to the camshafts, then to another orifice in the front cam bearing, then to the cam phasers, then lastly to the chain tensioners. Nice fault tolerant design. pffff. Then there is the 2 piece spark plugs that seize in the head and break off. The special tool used to extract the piece works perfect, because it came out 3 months after this design rolled out to the public. They knew. The repair manuals don't show the oiling diagram......interesting, yes?
oil-flow.jpg
This is a 1st generation diagram, it still tells the story.
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