Below is how you test the Overflow Valve....

 

if its bad how would that make me lose my prime

 

If the overflow is stuck open even just a little it will allow the fuel in the vp to drain into the fuel return line and back to the tank. Does it loose prime even with a full tank of fuel?

 

well i hope everyone enjoyed there new years party. hope this year is better then the last. but anyhow i replaced my overflow valve yesterday and it didnt do a thing. iv gon throuh and put a wrench on every line i could. so im at a lose any more thought wht it could be??

 

well replace my overflow valve and still noting say it wont start untill u cycle the lift pump a few times. im running 20-21psi for fule pressure. what should i run for a psi. ik when i get on it it drops to about 15-16. also when i cycle the lift pump my edge cs will only read like 18 then soon as it stops it will drop to 0 within seconds?? i would think i would hole some fuel psi hence the reason i think im loseing my prime. or is my VP44 going

 

I would replace the connector tube o-rings and retorque the lines. 5 of 10 vp trucks that complain of extended crank times from my experience will have a leaking connector tube. I start here because its hard to confirm and very cheap to repair The other 5 are vp/lift pump issues. Ive seen a few occasions where aftermarket systems were leaking and loosing prime, maybe one cracked tank module. Used to use air to check them but a smoke machine is much more effective in the lp or suction side. 21+ psi will also cause a hard start.
Also wondering why or how you confirmed a loss of prime?
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i just figured i was losseing prime bc after u cycle the lift pump a few times it will start. and are u saying i should bake the pressure off my raptor 150 to 18 or so psi. i guess i can replace the connector tub o rigs. shouldnt be to hard of a job if i get i puller??

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well did some more looking today and i found fuel on the bottom on my raptor 150? say there are allen head bolts and i couldnt tighten them anymore looks like a seal or something is bad there

 

Thats probably the issue

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