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Old 07-03-2009, 08:16 PM   #1 (permalink)
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New VP44 no start

Ok, just installed my new VP44. Went through the bleeding of injectors 3 and 4. Got fuel out of 4 and a small dribble from 3. Tried to start the truck and all I'm getting is it's cranking and starts to try to start but doesn't catch. I bled the injects again this time including 1, 2, 3, 4 and tried again. Same thing. It's trying to catch where it will fire just slightly but won't come to life. Anyone else dealt with this? How in the world do I get my truck to come back to life?
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Old 07-03-2009, 08:22 PM   #2 (permalink)
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you did replace the lift pump w/ a high quality aftermarket one like a Raptor or Air Dog right???

do you have a fuel pressure gauge??
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Old 07-03-2009, 08:54 PM   #3 (permalink)
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Quote:
Originally Posted by cmns2500 View Post
you did replace the lift pump w/ a high quality aftermarket one like a Raptor or Air Dog right???

do you have a fuel pressure gauge??
Sorry, forgot to put this in. I have a FASS system and gauges. FASS system is running and supplying fuel to the VP44. I get signs of fuel at the injectors. Wondering if I'm doing something wrong. How long do you need to crank it for it to start after bleeding?
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Old 07-03-2009, 09:01 PM   #4 (permalink)
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Quote:
Originally Posted by Cataract2 View Post
Sorry, forgot to put this in. I have a FASS system and gauges. FASS system is running and supplying fuel to the VP44. I get signs of fuel at the injectors. Wondering if I'm doing something wrong. How long do you need to crank it for it to start after bleeding?
It can take a bit. But dribbling fuel is not bled. It'll run fuel out of the lines.

Try loosening 1,3 and 4 only. I mean loose enough to pull the nuts back. Have a helper watch under hood.

Before that, confirm the lift pump has purged all the air out of the lines to the VP. Bump the starter and allow the pump to run until it stops. Do this several times. 3-6 at least. DO NOT CRANK OVER DURING THIS!!!

When you think you have the truck ready to start, turn the key on and bump the starter. When the pump begind to run, crank for 10-15 seconds or until your helper sees fuel coming out of a line or two. Also, do not allow the truck to start.

Tighten the lines that have heavy fuel. When all three flow fuel, then you can go for it.

When everything is tight, crank the key. Do NOT touch the throttle.

It'll take some cranking, but should eventually start. Some start easier than others. The Electric pumps can be a bit more work. On the trucks we have done cam swaps and 12V pumps on, we don't have to bleed ANY part of the system. Just crank and it lights.

Dave
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Old 07-03-2009, 09:58 PM   #5 (permalink)
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Got it. Just needed some more bleeding. Finally, trucks live again.
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