[s-cars] Fuel Pump Woes!!!! HELP...

[Mark Strangways]

Put a fuel pressure gauge on it and see what the pressure does when you get 
into it.
The pressure should be 4.0 bar at atmosphere, and rise from there with boost 
pressure.
If it goes down or doesn't hold steady, then the pump may be starving for 
fuel, or it simply isn't the correct pump for the job.

Mark
----- Original Message ----- 
From: "Levent Cur" <leventcur at charter.net>
To: "Audi S-list" <s-car-list at audifans.com>
Sent: Monday, February 21, 2005 9:37 PM
Subject: [s-cars] Fuel Pump Woes!!!! HELP...


> Ok so i bought a fuel pump for my 95 S6 from good old Shokan. They sell a 
> Pierberg pump for my cars application. It is about 3/4" taller than the 
> stock VDO pump that came out. My mechanic put the new pump back in, and he 
> said he clipped the top down. So now the pump he believes is sitting too 
> low with about 1mm of space between the feed at the bottom and the bottom 
> of the tank. Now comes the fun part... We went for a test drive, and the 
> car stumbles real bad when any gas is given to it. Keep in mind it drove 
> perfect when i brought it in; i was just having starting problems, and we 
> had determined through earlier posts it was fuel related. Now the problem 
> is Shokan and my mechanic both say since the (new 3/4" taller) pump is 
> clipped into the stock location that its sitting to low in the tank and 
> thats whats causing the stumbling when on the throttle hard. This is kinda 
> funny cause the car ran perfect, 22 lbs of boost and no stumbling before 
> the fuel pump install today? With the pump prolly barely at all off the 
> floor of the tank cause it to starve for fuel when the car is pushed 
> harder? I'M SO LOST! The new pump is not bad by the way.
>
> -=Levent=-
>
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