Truck turns over fine, does not fire off. No white smoke coming from exshaust. Scanner shows no codes, passes injector buzz test. ICP reaches 3200 psi and 15% duty cycle on IPR. Idk im lost. pulled valve cover and no oil coming out of injectors so i know they arent firing just dont know where to go from here. also my wts light works, tach works ect ect. changed cps just in case but no change either. any help would be great thanks

 

Is there fuel pressure?

 

Yes, about 50 lbs

 

All the fuses good?

 

Yes all fuses good

 

So you have good Bat power (over 10.5 volts while cranking) and fuses (including the 2 dark green fusible links at the starter relay), fuel pressure over 50 lbs at the schraeder valve) , ICP pressure over 500 lbs, tach spins up while cranking... and no white smoke?

At this point, you still have not mentioned it you checked voltages and function at your Glow plug relay. Does it have bat voltage? Is it getting voltage from the ignition switch when turned to start. It is cycling normally? If it doesn't. There are 2 fusible links and 2 fuses in all, that are in that system.

Next, the mysteriously missing white smoke would be unburned fuel, which it should be doing normally, if it were getting fuel and not catching in other than warm temps... So... Did you try giving it an alterante fuel source yet? (WD-40 or ether)

Because a powerstroke is still a diesel. It will catch on WD-40 or ether, even with the PCM unhooked. (And fire on just fuel and compression.) If it did, then it would be a question of why no fuel, if you have good pressures mechanically. Since the injectors need certain conditions met for them to fire electrically, then you would go down that list.

ICP pressure and CPS you have already ruled out-> SORT-OF... If you are getting that good of a pressure at cranking, I would be suspect... I would unplug the ICP and try it again. Why? Because my HPOP is amazing = will push 3860psi, which is unbelieveable... and you don't get those high of pressures without the motor running at RPM's and with it being asked for. Most people stock don't get over 2500 lbs at WOT at 80 mph. And you don't get those pressures at cranking speed. So with it showing those pressures for that engine speed, those may show as normal, but would be out-of-range for what is being asked for (out of context for the conditions), the ICP might be showing them in error (not confirmed by a mechanical gauge so.)

Even then, if it was that high a pressure and it were being asked for by the PCM, that would also mean in that condition, the injectors would also be asked to give mass amounts of fuel... but you have no white smoke (which would be there if it were doing that), so there is a contradiction there.

So, basically, what am I saying? Check the glow plug system and then give it an alternate fuel source manaually and see if compression will fire it.

 

I'm not sure on the fuesable links but everything seams to be getting the power it would need. Batter voltage is good. Glow plugs are working. Well at least the relay is working. With icp unplugged its showing 2600 psi. I'm pretty sure my problem lies there because I thought it should default to 500 psi or so. I guess I really need to put a 3000 psi gauge on it to check for myself.

 

You usually test HPOP with a 5000 lb. gauge. Should be safe w/ a 3000 lb'er just for cranking., but just so you know, if for some reason it peaked, Joey tells me that the pressure relief in the HPOP is usually set at 3650 psi, (which is rare that any HPOP ever makes it to that). But yes cranking should be at above 500 lbs.

What scanner are you using? What live data can it read on OBS?

 

No white smoke while turning over and no start, the injectors have no fuel or are not operating.

 

ok guys i still havent had any luck with my truck. i know the injectors are not firing because of no oil coming from them but it passed the injector buzz test so i would not believe it to be a bad idm. any input? thanks