Looper or not

Just because you have a new VRO pump, doesn't mean you have a working VRO pump. I chased this same problem before on an engine with a new pump, ended up being the pump was bad out of the box. Get a fuel pressure gauge on it and see if it is holding pressure when it does it. I know this VRO pump when it messed up would block the fuel flow so I couldn't even get fuel to it by pumping the primer bulb. I had to use a hammer to hit the pump to get it to pop open and allow fuel to flow so I could get back to the ramp.
 
Ferm, what you said about just because its new made me think ! long story short. I think I have the answer .The fuel line had a split in it. Not even sure how this happened considering that its not old at all . Replaced it and seems to have solved the problem. Thanks,
 
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