Hard starting when engine is warm.

[pizzo]

Originally Posted by hounds It DOES appear that leaking or broken fuel lines would be the obvious culprit but why only when its warm? Why not all the time? In MY situation I DO see a little bit of fuel and its leaking from where the fuel lines go into the injectors (and they are TIGHT). Not pouring out but seems to be leaking. I don't see any leaks anywhere else from the tank all the way up to the filter, into the IP, etc. thanks Hounds change your fuel lines I agree with Coal Train Start with your fuel lines first then when its done and all the air is out of it. see if it starts when its hot If it don't start then get a vp44

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[hounds]

Thanks guys. I really DO think its in the lines somewhere. Its gonna be a SOB to put the HP lines in though right?

My VP44 is less than a year old, I have doubts it's the IP. BUT, never know with this beast I guess. The IP has been getting 20-25psi since put in, with this airleak, will that cause the IP to fail as well?

[Coal Train]

The fuel lines are easy.

Nothing more than two 19mm nuts that secure the line heads to the pump and connector tubes.

Just do one at a time (well, techically three at a time because of the bridge) and you'll be fine.

[hounds]

THanks. I'm leaning more and more towards the fitting deal.
They have been loosened and tightened God knows how many times and yes 3 of them appear damaged from over tightening.
My IP is new and since I have had them go twice on me already with the same warnings (different than now) I am not so sure it IS the IP this time.
Last 2X IP went, it started stuttering under a load while driving and also hesitated at start and once it went, truck wouldn't start at ALL.
This time, once it starts it runs great with exception of spittering and sputtering at IDLE once warmed up. Under a load or driving it seems fine.
I will try to find some good used HP fuel lines to the injectors.
But, in the meantime maybe I'll run some rubber hoses from tank all the way to filter and up TO the IP and see if that does anything. My guess is no or minimal.

Thanks again for the tips.
I just dread the thought of actually doing the work myself, with minimal tools. Although it appears once the lines are out, I can install 3 first then 3 more with not too many problems. Craziness.

Another question: IF I continue driving it this way could that cause the IP to fail? or otherwise other problems?
I installed a fuel pressure guage years ago (after my IP failures) and its always reading 20-25psi so I know the IP is getting plenty of fuel. But if air is constantly slipping in there, thats my worry.

[Coal Train]

If it's hard starting, more than likely the air is backing down to the IP.

I think the first nuts I'd check would be the ones at the IP because, realistically, the air isn't going to flow DOWN the lines to the IP, it's gonna come up.

So more than likely the leak is at the IP.