Truck Repair: Cummin Diesel Engine., drive oil, position sensor

Question

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What is EPS Sensor?
What is Accy Drive?
Followup To

Question -
I have a 1995 Freightliner with Cummin Engine. I opened the front of the engine to change the front cover of the block where the fan attached to the motor. After I put back everything I start the truck it started very well and I took it for test ride, I was about 3 miles from where I was working the truck quited and never start again. Now I am using the Start Spray to start it and when I stop spraying the engine die. Please advice.

Answer -
Check the EPS sensor between accy drive & oil pump.

Answer
Engine Position Sensor screwed into the block under the Accessory drive(also called air comp drive) to read markings on the backside of the camgear.Has a 4 wire plug that should ohmn from 1000-2000 ohmns & I would remove it & visually check it to make sure it is not separating(black plastic material protruding past the metal housing).