99 died and wont fire... VP already addressed

J

JDsimpson

luvcummins
Joined
Jul 25, 2012
Messages
5
Truck randomly died

lift pump was weak or dead so a new VP and lift pump went in the truck. Got good fuel at the supply for the VP with no air (took awhile).

cracked all 6 injector lines and used lift pump to push fuel and air out of each one then closed them. Tried to start it and nothing. Cracked all 6 again and spun the truck over with the ignition and i barely get anything out of one line... it will not spit of out each of the 6, even if you crank for 45 seconds.
All the VP codes are gone now. Only codes I have are throttle position sensor and a companion code....

Completely lost here, maybe its not fuel related, but it sure seemed like it. And it also seems like I should have more at the injectors while its spinning over....

any help or things i can check?
 
Checked the OFV to make sure all the fuel isn't returning to tank?

Where did you buy VP from?

It only takes 2 pins on the VP to crank up and idle. Search on here, put 12v and ground, see if it will run.
 
If it took a while to get fuel to the vp your lift pump is crap. Or your filter is plugged or you have an issue between tank and pump
You need to check that guy first.. It also could be why you just replaced the vp..
 
Last edited:
24vriviera said:
If it took a while to get fuel to the vp your lift pump is crap. Or your filter is plugged or you have an issue between tank and pump
You need to check that guy first.. It also could be why you just replaced the vp..
Click to expand...

It didn't take anytime at all to get fuel to the VP supply side, the lift pump is flowing great amounts of fuel. It squirts out if you crack any line. I have a manual gauge on it and its putting out 14psi whenever it is on.

I just cant get much pressure at the injectors
 
Check your fuel system fuses and relays. These run the vp as well..
Make sure you have 12 volts on the 2 pins closest to the block on the large plug on the vp with key on.
And a dry pump or injectors out both takes a while to get running.
If those check out keep cranking... Or use ether.
Also check out blue chip's vp44 diagnostic page. Foolproof stuff on how to make sure vp is good
 
24vriviera said:
Check your fuel system fuses and relays. These run the vp as well..
Make sure you have 12 volts on the 2 pins closest to the block on the large plug on the vp with key on.
And a dry pump or injectors out both takes a while to get running.
If those check out keep cranking... Or use ether.
Also check out blue chip's vp44 diagnostic page. Foolproof stuff on how to make sure vp is good
Click to expand...

Good advise, I have checked everything but I will do it again just in case.

Should have 12 volts on both pins? I will check that also!
 
no, across the 2 pins, one is ground one is positive. read blue chips page, has it all there.
 
I have power and ground, no issues there.

I am starting to believe this pump must be dead
 
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