I Have A Problem With My T-bird's Fuel Pressure Falling At Acceration From 40 Lbs To 25. Is This Strictly A Fuel Pump Problem... Or Could It Be The Fuel Pressure Relay, Faulty Tank Gaskets Or Something Else Causing This Problem ? I Know It Has A Aftermarket Pump In It.... Probably A Cheap One. Any Help Would Be Greatly Appreciated.....
Pump size?
Engine combo?
Injector size?
We need a little background....
Pump Size Is A Stock 88 Lps, 2.3 Turbo With 5 Speed Transmission And Stock Injectors.. Have Already Replaced Fuel Injector ''0'' Rings, Fuel Pressure Regulator, And Fuel Filter...
with the vehicle running and in park, if you kink the return line, what happens to the fuel pressure?
If pressure is falling at WOT, it's a 99% the fuel pump is shot or filter is restricted... Just disconnect the regulator vac and test it again, if pres still falls it isn't likely the regulator... I've seen a pump that made 80 psi dead ended, but still couldn't make 50psi at WOT... One TC I had the pump wouldn't make more than 25psi dead ended, and the guy wondered why it wouldn't run worth a ...
BTW at TC should have 55psi at full boost...