Odd no start issue

DIESELMAFIAPER.LB7

<----twinz
Jan 17, 2010
5,132
0
36
idaho
So been a day two since I've posted here but I'm fighting a lbz got a long block for a customer installed in a lbz.

The truck throws a crank sensor code p0336 but I'm seeing 165-195 rpm cranking. So sensor can't be backward. Sensors worked perfectly prior to replacement. Truck was running when it came in and now has a new motor, fuel system, turbo ect ect.

I'm building fuel pressure up to 11k then it drain down to 2k while extended cranking is going on....

I'm stumped I've checked all the grounds(I cleaned the surfaces of the new long block prior to install) even re flashed the ecm all that is fine and looks good. Going to swap a sensor but it's the only damn code I have and I can't see it being a sensor where I am reading rpm.

Curious if anyone had ran into this. The truck acts like it's not getting a signal to fire somehow.
 

DIESELMAFIAPER.LB7

<----twinz
Jan 17, 2010
5,132
0
36
idaho
Well went and bought two new sensors and it fired up odd but it worked I swapped the sensors prior just to make sure I didn't put them in wrong but I was pretty sure if they were swapped the rpms would read high cranking