Jaynik

Does it work to test fuel pressure while cranking an engine, with the fuel line terminating into the tester? or does the engine have to be running/ does the tester have to be tee'd into the fuel line.

If not I am getting 3-4 psi before the regulartor and suspect a broken fuel pump.

trochoid

iTrader: (6)

Gauge shoud be teed and not deadheaded as the stock system is a bypass system. Deadheading the fuel at the gauge will give the max output reading of the pump, if that's what your goal is.

alex_the_hipple

what trochoid said.

- alex

Jaynik

Does the vehicle have to start for this to be accurate or is cranking enough

trochoid

iTrader: (6)

83 and earlier, turning the key on should start the pump. 84-5, crank.

nighthawk34

My old fuel pump started at 10psi and built up to 40 after 20 min... I replaced it and get 50 PSI all the time now!!

trochoid

iTrader: (6)

That's fine for an FI SE, but that pressure will blow the gaskets in his carb and collapse the floats.

nighthawk34

OOPS.. I should have told him that.. Sorry!

Jaynik

Thank you so much!