[urq] Fuel pump check valve

[Patrick Carlier]

All the efi cars I have seen have a check valve , either on the fuel pump 
ore somewhere near it .
So I guess there's  a reason for it .
Removing it could result in the fuel line empying itself to the tank wich 
would cause
poor starting conditions . Pump would have to run a few seconds to build up 
pressure ,
wich is otherwise maintained by the check valves .
The second check valve is the pressureregulator on the fuel rail btw .

Efi cars don't have an acumulator , so you're right in removing that one .
Altough it does no harm if you leave it where  it is .

What I think you should add is the mushroom shaped damper wich
simply replaces the nut that ataches the fuel line to the pump .
Audi part nr 441906095 Did thesame to my AAN conversion .
Don't forget to coat it , we have harsh conditions underneath the chassis :)

>From memory , the connection is an M12*125 with an SAE flare , but I ought 
to
check to be sure . Memory 's starting to wear to :)

Pat





----- Original Message ----- 
From: "af" <afinn1 at gmail.com>
To: <urq at audifans.com>
Sent: Tuesday, January 13, 2015 4:10 AM
Subject: [urq] Fuel pump check valve


> Folks can I ditch the check valve on the outlet side of my 044 Bosch fuel 
> pump with my Motronic ABZ motor? I have ditched the accumulator but was 
> not sure about the check valve. Thanks. Also does anyone know the fitting 
> size of the male (I believe) fitting that connects the hard plastic line 
> after the accumulator to the steel fuel line heading to the motor? I 
> believe the male fitting is on the steel line but could be mistaken. 
> Thanks again.
>
> Andrew Finney
> 1985 Urq V8
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