Too much fuel pressure?

HVFC6040

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Just curious what exactly happens when you over pressure a factory fuel bowl. Im assuming the regulator can't overcome the massive amount of pressure, but what else happens with as far as the engine?

Ive been slowly working on my old truck, and trying to diagnose a loss of power issue...then it dawned on me, I still have the old FASS 150/180 (or whatever the numbers are) hooked strait to my stock fuel bowl, with no other mods.

Yeah, I know...stupid me. But didnt even think about the fuel pump when I slapped a stock motor back in the truck.
 

Magnum PD

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You didn’t change anything with bowl? Still has the stock fuel pressure spring? No fuel pressure gauge?
 

DieselDC

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You’re good on the fuel regulator b/c it won’t change unless you messed with it. I’ve rebuilt a few of them so you gotta be careful with them o-rings and aluminum seats/groves.

You’re probably not getting enough pressure? Out s fuel gauge on.

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