Fuel pressure quesiton
04-08-2008, 10:57 PM
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Join Date: Apr 2008
Posts: 8
Fuel pressure quesiton
2000 mustang 3.8l
I have been having hard starts after my car sits overnight or after a few hours so i hooked a fuel pressure tester up to the shradder valve on the manifold and it read about 30-32 psi at idle and under rev at about 3k rpms it didnt really move at all. after turning off the car i left the guage hooked up to see how fast the pressure drained and it drained 1psi every 10 minutes or so and after an hour and a half i was down to 10psi. Do you guys think i need a new regulator or a new fuel pump?
I have been having hard starts after my car sits overnight or after a few hours so i hooked a fuel pressure tester up to the shradder valve on the manifold and it read about 30-32 psi at idle and under rev at about 3k rpms it didnt really move at all. after turning off the car i left the guage hooked up to see how fast the pressure drained and it drained 1psi every 10 minutes or so and after an hour and a half i was down to 10psi. Do you guys think i need a new regulator or a new fuel pump?
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