Engine/Transmission (1998.5 - 2002) engine rotates but wont always fire

[TNowak]

I own a 99 and have been having problems with the truck wanting to fire up. Some times i will go out and it will start up just fine, next time i try it will sit there and crank away. i replaced the lift pump about a 1 1/2 ago, and replaced the fuel filter the last time i changed the oil about 2 months ago. I have a fuel gauge mounted on top of my fuel filter housing and it is reading at idle 9 and under throttle 15+ it only reads up to 15. Im wondering if i should install new lift pump or can it be somthing else. i also have replaced the gas cap because i have heard of stupid problems caused by leaky ones. if anyone has any suggestions let me know.



--------------------------------------------------------------------------

99 quad cab 4x4,edge drag comp, 5", kn, stage 5 jammers. 118000 mi

 

[TNowak]

what the hell

i have a diesel pickup truck on a diesel forum and nobody has a reply. this must not have happend to anyone else. i think its time to let my tdr subscription run out. thanks for all helpful insite and the bogus stickers for the lunch box.

 

[AFarmer]

Could be the VP44 just bit the dust.

 

[Forrest Nearing]

:{ :{ :{ :{ :{ :{ :{



:-laf

 

[cojhl2]

Since this prob only occurs sometimes, I would be suspicious of the fuel return circuit letting air in the system therefore allowing fuel to drain back to the tank.



Is there a relationship between hard starting and level of fuel in tank?

Is there a relationship between pickup parked angle vs hard start. (nose uphill)



What sometimes can happern is that the return line in the tank terminates above the fuel level. .

 

[JKinney]

You need to get plugged in and get the codes read.

 

[PZech]

Mine does this sometimes also after the removal of the stock lp & filter housing and replacing it with the fass. It only does it when it's warm and I can stop it by bumping the starter and allowing the pump to run for a short time before I crank it. I know it isn't right but haven't had the time to mess with it yet!

 

[WadePatton]

He dun got mad and sold that truck.



Codes, fuel level, fuel pressure shouldn't increase with demand, LP is mighty old, bad fuel will plug a new filter in a few minutes, cross-over tube leak will give hard start. VP44's give a myriad of problems when taking their last gasps of fuel.



Maybe a search of this here goodfernuthin website. Cuz sometimes a question that has been asked several dozen times gets ignored--not that I ignored yours or anything. Just didn't see it. I don't look real hard at the 24v forums. :-laf

 

[TNowak]

im trying

i replaced my fuel filter,charged batteries to full, replaced fuel cap and filled the fuel tank full. when i bump the lift pump the fuel pressure reads 6 psi. and it seems like it primed the fuel. is this lp bad, should i just try and replace it or cough up the cash to take it in.

 

[Cummins724]

I would definately get the codes read, but sounds like a vp story. It is possible that it is something stupid. I have read alot of posts & learned that when someone has a fueling box & a stock lift pump..... It is usually a vp. I would start with a scan tool before buying anything. If a scan tool isn't available... go to Auto Zone or Advance & get it done for free. Good Luck... . Hope I'm wrong.

 

[FYarcho]

Seems that 6psi should be enough to start it, but that still seems low. Mine under the same scenerio will read 14 psi.