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General Buick Tech / Re: Attention Fuel Pump Installers
« on: July 25 2016, 09:56:45 AM »Makes no sense.☺ So your FP is 45 psi with the hose off the regulator? Yet it is 41 when the engine is running? Do you mean it is 41 when you put the hose back on the regulator? And the engine is running in both cases?
I'm pretty sure that is what you mean, but I don't know if Tar Baby understands how fuel pressure is set.
Of course it's early in the morning and maybe I am just confused😄
Get some more coffee. As long as you're at idle (and under vacum) pressure will go down when you attache the vac line.