Jakobj

Is the psi pressure on my fuel rail supposed to drop? When i turn the key on it hits 42 psi. When i shut the key off the pressure drops and bleeds off. Im new to fuel injection. Car wont start just cranks over.

dawson1112

No it should hold pressure. you have a leak in the system, likely the fuel pump check valve is bad.

88 orangepeel notch

Welcome to the forum......

How fast does it bleed off ? My car holds pressure for 5 - 10 minutes, then very slowly drops a pound or 2 every half hour. Then the instant I turn the key, pump primes and pressure is right there again.

Jakobj

QUOTE=88 orangepeel notch;8539379]Welcome to the forum......

How fast does it bleed off ? My car holds pressure for 5 - 10 minutes, then very slowly drops a pound or 2 every half hour. Then the instant I turn the key, pump primes and pressure is right there again.[/QUOTE] It drops after i turn the key off. How much pressure should it be holding?

Jakobj

Thank you for the info. Can you tell me please how much pressure i should be getting whenthe key is on?

alecracing

Stock should be 40-45 psi with engine not running, or engine running with vacuum line pulled of regulator...or 32-35 psi with engine running and vacuum line hooked up to regulator

Jakobj

Thank you.