[Diy_efi] Fuel pump run time with key on

[Gianmarco Rizzo BE/EAS]

as  someone else already pointed out, there should be a one-way valve in the fuel pump, and the fuel pressure regulator on the other side of the rail. these should keep the pressure in the rail. if fuel drains back to the tank, then either the valve or the fuel pressure regulator are not working properly. or there is a leak somewhere else.


gm

> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org 
> [mailto:diy_efi-bounces at diy-efi.org]On
> Behalf Of Ben
> Sent: Montag, 22. August 2005 09:25
> To: diy_efi at diy-efi.org
> Subject: [Diy_efi] Fuel pump run time with key on
> 
> 
> When I turn the key on, my fuel pump runs for 2 seconds to prime the 
> system.  Unfortunately, my fuel drains back to the tank almost 
> immediately and I have to turn the key off and on 5 times to 
> start it up 
> without having to crank it forever.  Is there a setting in 
> the computer 
> to make it run longer?  91 grand prix SE 3.4 DOHC 5 speed 
> using DF code.
> 
> Ben
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