Engine/Transmission (1998.5 - 2002) Truck suddenly stops?

[DAB]

I'm new to 24v trucks, just got a 2000 truck last weekend with high miles. I've always been leary of lots of electronics on vehicles,guess thats why I kept my 94 12v around. Started truck today, and it ran for about 3 sec. and stopped and won't start now. Where do I start. Is this that dreaded lift pump I've read about?



Darren:{

 

[Thomas]

Crack the banjo bolt (the one with the schrader valve) at the inlet of the injection pump. Bump the starter but don't attempt to start the engine. The transfer (lift) pump should run for a period of time. If fuel sprays from the loose banjo bolt you are getting enough from the transfer pump to run the engine. The 'spray' test does not guarantee that the transfer pump is putting out enough pressure however. You will need a gauge to check out the transfer pump.



Had you done any work on the truck before the engine stopped? It sure sounds like air in the fuel system.

 

[DAB]

Thanks Tom

I cracked open banjo bolt and hit starter ,nothing came out but a few drops. Lifter pump made a funny crackly sound for a second or two. Is that the way its supposed to sound?Fuel filter was changed 2k miles ago.

Darren

 

[Thomas]

I started to reply an hour ago and got pulled away from the keyboard. From the model year 2000 Factory Service Manual:



"The transfer pump is self priming. When the key is first turned on (without cranking the engine), the pump will operate for approximately 2 seconds and then shut off. The pump will also operate for up to 25 seconds after the starter is engaged, and then disengaged and the engine is not running. The pump shuts off immediately if the key is on and the engine stops running.



Also:



"The VP44 is not self-priming. At least two fuel injectors must be bled to remove air from the system. "



I added the bold above. This is the "bump the starter" in my first post. You want to make the starter engage without the engine starting, and immediately move the key to the run position. This should get the lift pump to run long enough to get fuel from the banjo bolt at the injection pump (VP44). Hopefully the instructions in my first post get you started.



If you get fuel at the VP44 banjo bolt and still don't start, you will need to bleed air after the injection pump at a few fuel injectors.



Good luck.

 

[DAB]

Thomas

Are you saying I have to bleed the injecters,because I loosened the banjo bolt?I didn't get any fuel spraying out when I cracked the banjo bolt and tapped the starter,or do I have to take it off completly. Like I said ,I'm new to 24v trucks. I could use all the advice anyone is willing to give.

Thanks

 

[AggieJustin]

Since your transfer pump only ran for a couple of seconds, you wouldn't get much fuel from that banjo that you had open. You need to be sure that you bump the starter (in other words make sure the engine turns over, but does not start), this will cause the transfer pump to run for an extended period of time. If it runs it's full cycle and you don't get any fuel at that banjo, then you probably have a bad lift pump.



If you do get a good flow of fuel, tighten up the banjo and you can try starting it again. Hold your foot on the accelerator about halfway as you crank. If this doesn't get it in a couple of tries, then you'll probably need to bleed a couple of injectors.



JM

 

[CFAR]

The only lp I've heard make a funny crackly sound was my first bad one. Open the schrader a little more and then bump the starter. It should spray.



lol