yes it could be electronic issue

did you check and see if the shut off valve is working

 

As of today new lift pump, coolant sensor, crank sensor, thermostats, and fuelfilter, and new fuel with additive. Truck is hard to start but once running idles great. any time throttle is pushed it bogs down, can stomp down and push threw it but returns trying to maintain speed. Seems to have a whine noise from one of the pulleys. Oh yeah pmd is fairly new and updated stronger type. No air in coolant and no fuel leaks any thoughts would be appreciated.

 

are you still getting code if so what are the codes again

 

Only two codes but same ones crank sensor and coolant sensor which both are new.p335 and p126. I have very noticable whining coming from belt wheni do get the truck to start and is effected when pushing throttle.

 

Crankshaft Position Sensor for all 6.5TD engines 94-02 in C/K trucks, Vans, Buses, and Cab/Chassis combination trucks and HUMMER H1's.

Replace when code 19 or P0335 shows.

Will require a TDC Learn Procedure to be performed after replacement to "zero" everything back up.

 

Good news if it's a crank sensor is that since your truck is obdII you don't need a bi directional scanner to initiate Tdco learn. A simple key on/key off procedure will suffice. A quick google will turn up the specifics.

Bad news is that a crank position sensor can be a biotch to replace in situ....

You also posted you had no fuel at the injectors but now it runs.

What's down with that? A "no fuel" condition doesn't usually fix itself unless it's air.

Did you replace something? Otherwise, if you had no fuel and now you do, I would suspect the system of sucking air into the fuel somewhere.

Something like a pin hole somewhere (rust, cracked rubber, etc) has been known to confound many backyard wrenches for an eternity chasing down a poor running problem.

I'd chase down your fault codes first though if it were me.

Have a good look at the wires on your cps. They've been known to fray and separate from their insulation. I'd chase down the wiring on your temp sensor also since you say it's been replaced.

12 years in a hot, vibrating, oil and diesel soaked environment is hard on electronics, wiring and wiring insulation.....not to mention any heavy handed and clumsy techs that may have been under there.

Its worth a good checking out and it won't cost you anything but some time....

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I think I replaced the lift pump and fuel filter and full tank of fuel.took a little time to get started but once running idle was ok but any throttle would big down engine.still hard to start and same 2 codes.running real rough when throttle is pushed think governor in pump is going, pump has over 100k miles on it that I know of.