My engine is flooded, so I need to isolate fuel pump and try star

Question edited for clarity.
Question moved from COOKING category. It got lost for 10 years!

Audi A6 / S6 (C5/4B; 1997-2004) fuses and relays

Fuse Box Diagrams https://fuse-box.info > audi > audi-a6-s6-c5-4b-1997-...

Fuse box diagrams (location and assignment of electrical fuses and relays) Audi A6 / S6 / RS6 (C5/4B; 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004).

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This is a audi A8 but I'm sure the feul pump is similar. Check out the Youtube video on how to disassemble the fuel pump from the tank.
Youtube video

First check the fuse area for a blown fuel pump fuse or a fuel pump relay gone bad. Put some fuel in the carb area/air intake and try to start. If it starts momentarily it should be a fuel problem. If there is no momentary start, you are not getting spark. to the plugs. Think I would go with the fuel idea first.

try connecting pump direct to battery to see if pump works if it dose then a fuse or relay check all wire connections

On these websites, you find fuse box diagram for Audi A6 1997 (c4 an c5)

Audi A6 C4 1994 1997 fuse box diagram Auto Genius

https://www.autogenius.info/audi-a6-c5-1997-2005-fuse-box-diagram/

NEED HAVE VECHICLE CODE SCANNED FIRST LOOK FOR FAULT CODES MANY THINGS WILL CAUSE NO STARTING,LIKE BAD CRANKSHAFT POSITION SENSOR.FAULTY CAMSHAFT POSITION SENSOR,BAD SPARK PLUGS FOULED OUT BY FLOODING ENGINE DUE TO LEAKING FUEL INJECTORS,BAD ENGINE COOLANT TEMPERATURE SENSOR,BAD MASS AIR FLOW SENSOR.FAULTY ECM. CODE SCAN VECHICLE FIRST.IF NO FAULT CODES CAME UP YOU COULD HAVE FAULT IN FUEL SYSTEM, COULD HAVE STOPPED UP FUEL FILTER,BAD FUEL PUMP RELAY OR FUSE THE FUEL PUMP COULD BE FAULTY. TURN IGNITION SWITCH TO ON POSITION LISTEN FOR FUEL PUMP OPERATION IN FUEL TANK, YOU SHOULD HEAR FUEL PUMP RUN FOR FEW SECONDS THEN TURN OFF.IF NO FUEL PUMP BAD MORE LIKELY BUT CHECK FUSE AND RELAY FIRST BEFORE BUYING NEW FUEL PUMP.DONT BUY NEW PARTS HAVE VECHICLE CODE SCANNED FIRST USING DIAGNOSTIC SCANNER YOU COULD HAVE BAD CONTAMINATED FUEL.

On this website, you find fuse box diagram and description for Audi A6 (1997 - 2005)

Audi A6 C5 1997 2005 fuse box diagram Auto Genius

CAMSHAFT POSITION SENSOR

I have a 1995 AUDI A6 QUATTRO, and it had similar problems which the AUDI repair shop had to fix.

Fuses are located by the side of the dash board when you open the driver's door. The fuel pump fuse is situated in there.

HI,COULD BE ONE OF FOUR THINGS,1-PUMPS DO BURN OUT TRY A 12V DIRECT FEED TO TEST 2-FUSE? 3-FUEL PUMP CUT OFF SWITCH ,IF FITTED NEEDS RESETTING .4-FUEL PUMP RELAY GONE (COMMOM) THANKS.