Engine/Transmission (1998.5 - 2002) New Head, Truck Won't start

[Partyat33]

Don't have a clue why it won't start. Doesn't sputter at all, no smoke. Bled all six fuel lines. Thoughts please !





Dennis

 

[RM]

ill try to help. the fuel system does not like any air. ive had fuel system fight pretty me pretty hard to get all air out . no air can be present. start at fuel filter and bleed each piece till you get to fuel injectors. bleed at injector until you get fuel the fuel pump should push fuel all the way up to the fuel lines. do you have pressure on a gauge for fuel? with all the assecories in youre signature im assuming. is it steady at at least a few pounds. im serious when i say no air can be present thats all i can tell you. i hope this at least gives you some help. if theres air in the fuel lines it wont even start on either. which you shouldnt even attempt unless you disconnect the grid heater.

 

[Partyat33]

I got fuel coming out of every line. This really sucks.

 

[pro99]

Don't have a clue why it won't start. Doesn't sputter at all, no smoke. Bled all six fuel lines. Thoughts please !





Dennis

Sorry to hear about your concern. Can you fill us in on everything you did? What I mean is did you remove the injection pump? Did you replace cam? Where did you bleed then at? Head or pump? If you got fuel out all lines that to me sounds bled. Do you set any codes? If it doesn't start soon for you and you can't see why remove the return line that is behind the fuel pump and measure the return flow in 30 seconds of cranking. I know this is going to maybe sound bad but are you sure the injectors and cross over tubes are in correct? How did you adjust the valves?

 

[JPoindexter]

had similiar problem with my truck. aftermarket fuel pump/system just quit when it was 33 below zero. the fuse let go and after finding the pump not working we had to bleed the inj lines at the head. even after we had fuel showing it took five more tries to get the truck to buck and snort. after about 20 min of driving it was back to normal. one other thing comes to mind. if the head was off the truck with the injectors installed it is easy to ding the injector tips if the head was set flat on a hard surface. the injector tips protrude quite a bit below the head surface.

 

[MACHINEST]

Even though you have fuel coming out the lines at the injectors, you will still have to build enough pressure to pop the injectors,the best way to do it is if you have fuel at the injectors,is to tighten 4 lines down,leave 2 loose,you may have to crank it 10-15 times to build pressure in the injectors,don't crank over 15 seconds at a time,because starter will get very hot. once she starts to fire tighten down the other 2 ingector lines at the head,Hope this helps,The only other thing that would cause it not to fire,valves to tight,or air in system...

 

[Partyat33]

All good points. I bled the lines to the injector tube. I used starting fluid ( I know I know) and she fired right up and died. So, its a fuel issue. I rebuilt the engine from scratch last year, so I think I did it all right. I did not pull or put the head back on with the injectors in that is a bad idea. I did not remove the injection pump or anything else that does not go with changing the head. I do have the code that says the PCM and ECM have an error together. It cleared but still says its pending. So, for now I suspect that somehow the fuel is not getting through the injector tubes into the injector. I can't see how that can be, but it seem to be where its pointing. I did a compression test on cylinder #3 and got about 420 psi. Tomorrow I have to go out of town for most of the day. I am going to pull all the injectors and see how things look. Other than that, I can't see what to do !

 

[pro99]

Do us a favor and perform a volume test on the pump. If you bump the starter what is the pressure at? You may have fuel coming out the lines but not enough to feed them. You may want to still check the return volume to.

 

[MACHINEST]

So if you rebuilt the engine,did you have the front timeing cover off? If and i say if,are the gears in time?Also if the pump V44 was off of it and the key fell out ,the injection would be out of time..... Just thoughts... .

 

[MACHINEST]

Also is this the engine that was in the truck,If it is a differant engine,year wise,maybe your pump isn't the right pump for your electronics?

 

[jwilliams3]

ether... . bang bang. .

 

[bmoeller]

His truck was running prior to the head removal. The head came off because it was cracked.



Having the code(s), I would recheck the connections, and make sure a wire didn't get pinched somewhere. Can't think of anything else that hasn't already been suggested, at the moment.

 

[JPoindexter]

Partyat33. don't take this wrong but have you checked your fuses?. it would not be the first time a fuse has met it's end while doing maintenance. i have done my share of welding from batt connections ect. also a bad fuse could indicate a pinched wire ect. it sounds like a fuel problem but with all the computer controlled things on these trucks it could be electrical. just trying to help.

 

[Partyat33]

Have not looked at fuses. All the codes cleared. Runs great on ether. Somehow the fuel is not getting through the injectors. Hmmm.



Gotta make it work !

 

[JPoindexter]

Partyat33. concerning the fuel at the injectors, is this just fuel from your lift pump or is this high pressure fuel?. i would not want to play around with fuel at 4500+ psi. but if your injection pump is not pressurizing the fuel to the pop off pressure of the injectors then you would have low pressure fuel showing up at the crossover tubes but not enough pressure to run the engine. as to exactly how to check for high pressure fuel up to the crossover tubes i do not know but be careful. hope this helps

 

[Partyat33]

Thats a good point. It did not think it was possible for the Transfer pump to push through the injection pump.

 

[Todd T]

Just keep cranking on it in short bursts. You've got air in it and it'll take a bit to bleed it all out.

 

[Partyat33]

I have cranked on it a lot. Far more than when I rebuilt the whole thing. I may fail, but I never give up !

 

[OPoole]

Check the wiring harness under the APPS.

 

[Partyat33]

OPolle, could you elaborate just a little on that ?