I need ya'll's help!!
Just changed the fuel filter. I bumped the key a few times to run the fuel pump...everything sounded fine. I went ahead and started the engine...it ran for a few seconds and died from no fuel. I have been running the pump for quite a while now and am getting no love....
Before I kill a perfectly good VP44 by cranking it dry, what am I missing? Is there a priming technique I should perform? HELP!!

Thanks!
BC

 

Check your fuel filter housing and make sure it's full of fuel. If not, your lift pump lost prime and you have to get fuel there first.

If you have a good prime, then you need to loosen the injector line nuts on a couple of lines. Don't take them completely off, just loosen them. Then crank till you get fuel to start coming out from around those lines. Then tighten the lines down and it should start right up after a little more cranking.

 

You need to bleed the system . I can't tell you where to look on a 24 valve for bled screws but I would look on top of the filter then around the pump .If all else fails loosen the line at the IP and let the air out .

 

I filled my filter housing up, and my frame-mounted pump will buzz quite a long while before cutting off. Because it's much louder than normal, I'd say the prime is gone...how do I get it primed again? It's got a line from the tank, and a line to the engine side...If I remove the hose clamp on the tank-side, am I gonna drown?
Thanks, you guys!!
BC

 

First thing is I would check your fuel pressure. The lift pumps on these things are notorious for going out and then taking the VP44 with it. Even though your lift pump runs, it may not be pumping fuel, another lovely feature with these trucks. I would check to make sure the lift pump is pumping fuel first. If its not, replace it with either a DDRP pump or a raptor or fass lift pump.

 

This is my 1st over-valved truck ( I know my way around a 12v pretty good) so pardon my ignorance on some things: Is the pump mounted to the frame rail a stock pump or aftermarket? I thought the OE pump was inside the tank...
I have removed the fuel line coming OUT of the pump and bumped the key. The pump runs loudly and nothing comes out. Is it a dead horse or has it simply lost its prime..and if so, how can I get it back?

I'm losing daylight and gotta be at work early in the AM!!

BC

 

Exactly right there klx650a2, the stock fuel pump will make noise, usually a little louder or higher pitched, and still be dead. Hold the shrader valve open at the VP, and bump the started to get the lift pump going. Maybe a couple of times. If no fuel comes out the lift pump is toast. If fuel comes out, loosen the injector lines on cyl. #1, #3, and maybe #4 or #5. Turn the engine over, and let some fuel spray/leak out some. Tighten the injector lines, and crank it up. It will run rough for a minute, but should straighten out. You may have to do this even if you replace the lift pump as the truck has probably lost prime.

 

In order to get the pump primed, you need to open the system up somewhere between the lift pump and the VP44. You can either loosen the inlet to the VP44, or one of the other connections. This will let the air bleed out and the pump should pick up fuel to prime the system (assuming the pump is still OK).

Once you get the LP to pick up fuel, then you can get the system up to the VP44 primed. Then you'll need to loosen some injector lines to bleed the high pressure side of the system, otherwise you'll be cranking for a long while.

 

Pump on the frame rail is an aftermarket kit. Pump in the tank is a dealer fix, and should be avoided.

 

How much fuel is in your tank? If you pull the line off the pump outlet and you don't get anything out while the pump is running, that's not good.

If your fuel level is low, it may just not be pulling the fuel up out of the tank. But with no downstream restrictions, I would expect it to pull full no matter the level.

 

I manually filled the filter housing, and cracked open the banjo bolt going into the side of the VP; I bumped the key 4 or 5 times to run the pump and got nothing. I guess I'll be spending money I don't have.
Question for my own sake (to answer my wife's FIRST question): Did I kill this thing by something I did or is it coincidence? The pump has been getting loud...that's why I bought the filter!
Where should I shop for a pump...the truck is stock.

 

i've ran my trucks out of fuel before and never had to prime the lp. had to crack an injector line . sounds like either its out of fuel or lp is dead and vp wont suck up enough fuel

 

Do you know what kind of pump is on your frame rail?

Lift pumps can die anytime, anywhere...it's just some die sooner than others, make it easy to tell/difficult to tell, etc. With an 01 filter drop in style, your line should never run dry of fuel just from a filter change.

Are you planning on keeping the truck stock for now, and just want a reliable, fairly cheap lift pump?

Just read the above post, you bring up a good point. Generally the Vp can pull enough fuel to still run. Hopefully it is just your LP that has failed and is causing enough restriction that the VP can't suck fuel and fire the engine. Turn the ignition on and off 3 times (leaving it on the 3rd time, not starting the engine though) and see what codes come up.

 

As recently as last week, I've run the fuel down well past the 'ding' of the warning light/chime....so I know the in-tank pickup is OK. It sounds like the pump is DOA. The wife is gonna rampage....
This truck is currently for sale here on DTR. I just need to get it back on the road...it's stock, and I don't plan on keeping it to hot-rod it.
The pump was getting loud, so I bought a filter figuring the pump was working hard....No good deed goes unpunished, I guess.
Where to shop, what to buy? The transfer pump that's in it looks to be the same as from one of our advertisers here...dieselstore.com...for $126.
Thanks for all the help, guys...you're great!
BC

 

The '01 you are working on does not need to be "bled" of air. There is an air bleed built into the overflow valve of the VP44 for this purpose. Just bump the key and allow the pump to cycle. Don;t allow the motor to crank over, literally bump the key. When the tone changes, you are usually all set.

Dave