low fuel pressure 55psi and leaks down.new fuel pump ,filter,sprider injector,e.t.c censor and computer no codes.ideals fine run great for 10 min in cold weather and 30 min in warm weather then starts chucking and rich or lean smell , but still ideals fine. tester in fuel line only pressure fine when hook in sprider injector low 55psi and leaks down. replaced fuel regular then new sprider inj that came with new regulator.

 

If there are no external fuel leaks, (lines etc) one, (or more) of the parts you replaced is/are bad. Gotta go back to the drawing board and diagnose the problem. You'll need to check fuel pressure and leakdown at the fuel filter outlet. All pressure and fuel flow must end at the tester. If it fails one or both parts of the test, the problem is in the tank. If it passes both tests, the problem is in the plenum. What year, make, model, & engine do you have? (testing methods and specs are not the same on all)

 

i also replaced the rubber seals going into sprider injecters