No start help.
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Joined: Apr 2019
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I am assuming it checks out because of the 2500 psi and the fact that it had a .2 when key on engine off and raised voltage as it was being cranked. I know it takes more then 500psi to start the truck so when the sensor reads 2500psi I would think it's working.
Also my bad I should have mentioned that the hpop system has just been replaced with all new fittings and o rings. I guess that would have been helpful.
Also my bad I should have mentioned that the hpop system has just been replaced with all new fittings and o rings. I guess that would have been helpful.
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Also why I am inclined to know what fuel issues I should be looking for when it's a hard crank no start.
I hear the fuel pump come on and also the clatter of the injectors cycling. But just not sure it is getting fuel.
I've yet to check the upper fuel housing as the weather isnt cooperating for me.
Hopefully this weekend will be better weather.
I hear the fuel pump come on and also the clatter of the injectors cycling. But just not sure it is getting fuel.
I've yet to check the upper fuel housing as the weather isnt cooperating for me.
Hopefully this weekend will be better weather.
Fleet Owner
Joined: Nov 2003
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As I said before, the PCM can use its own "inferred" value. Who knows if your is or isn't. I would check cranking ICP volts again, because the mismatch in voltage and pressure shouldn't be simply dismissed.
IF the .5 volts you posted is real, then the FICM won't issue a fueling command.
You might want to verify if you are getting a "Mass Fuel Desired" and an "Injector Pulse Width" commanded value.
We should probably stop guessing and wait to verify fuel flow (and probably also verify oil flow) .......................
IF the .5 volts you posted is real, then the FICM won't issue a fueling command.
You might want to verify if you are getting a "Mass Fuel Desired" and an "Injector Pulse Width" commanded value.
We should probably stop guessing and wait to verify fuel flow (and probably also verify oil flow) .......................
Fleet Owner
Joined: Nov 2003
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I know the ficm is at 48.5 volts while cranking. Batt is 11.5 while cranking. Icp shows .5 volts and 2500psi while cranking. Hpop/ ipr shows 85% while crank and 14.5 when koeo. Also not sure of the cranking rpm, I have a 6.4 diesel starter on the truck for the higher crank. I hope that gives you more info. But I will look at the upper fuel filter bowl when it's not raining or snowing. So hopefully tomorrow. 
Your link above shows 2.4 volts when cranking instead of 0.5 (and apprx. 1850 psig). Also, IPR is 60% instead of 85%. That is more like it.
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