fuel pressure
is that running pressure? And to answer your question it depends on the fuel pump strength & voltage, pressure regulator and Engine vacuum, and age of fuel filter. Cars are going to vary, Mine runs at 36-38 Psi while at idle and i have a 255lph fuel pump, ive seen a stock 97 Z28 have 47PSi with the stock pump & regulator
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From: madisonville ky
fuel pressure i just put a brand new walbro 255 in it yesterday it ran good for about an hour now it runs like **** you try to give it gas and it falls on its face i dont no what the deal is
did you get a good seal on your fuel pump bucket? i hear alot of times the clamp for the nylon line the runs on the pump comes off and causes a problem. but it is defently a fuel delivery issue. What does the pressure do with the engine off does it drop?
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most likely the flexible line in the tank not the pump itself. Fuel pressure is lower at idle because vacuum is applied to the regulator. To properly test the pressure you should be removing and plugging that vacuum line and should see 43-47psi these cars are getting old so check grounds too whenever a fuel issue is suspect.
fuel pressure with the vacuum line on the regulator should be between 38-41 with it off it can be anywhere between 41-47. Like i said it will vary from car to car so as long as yours is somewhere within those numbers you should be fine.
Well check voltage at the battery then check voltage at pump, It should be the same or within .2 of each other... Did you go back over your install and see if there is anything wrong?