I THINK ITS THE FUEL PUMP.

Volkswagen Fox Fuel Pumps are located inside your gas tank; being as liquid gasoline is not combustible, this is the best position for installation. Your car's Volkswagen Fox Fuel Pump is an apparatus that operates to move fuel out of the tank to the motor. Your car's Volkswagen Fox Fuel Pump pressurizes the fuel system to move gas from the fuel tank to the engine.

More than not its the ign module in the distributer.. this is the way they fail.. 2. the fuel pump on these cars are a problem too.The fuel pump is in the fuel tank. go to the rear of the car in a quiet area have someone just turn the key to on, not trying to start the engine. if the fuel pump runs it will run for about 1.5 seconds and you should be able to hear it .. it will be a buzzing noise. the relay just turns the pump on for a short time to charge the system then when the engine starts the relay via the computer turns the fuel pump on to supply the injectors. The reset is a cable is in the trunk of the car on the rear right side. it has a plastic tag on it for identification. The problem could be a clogged fuel filter.. mounted just in front of the tank under the car. If the IGN module is out there will be no spark.. check that before you start removing the tank.. I just bought a pump, a filter and an ign module for that car from www.Rockauto.com.. best prices anywhere. Pump was 1/4 of what autozone wanted for it !!

The problem is most likely the ground that would explain the gauge not working and the pump not working you can run a wire from the metal frame or metal body to the metal sending unit on top of the tank and see if the gauge works first.

Fox transmission will bolt to a Quantum diesel VW block.

idle control valve its about 50.00 to 75.00 I had same problem

The ignition switch and relay supply the power. Switch to relay, relay to pump. make a set of jumper wires and run them from battery to pump and see if pump runs . If it does its ok. Next pull fuel injection relay (under dash in fuse box)check it for burnt terminals , resistance and continuity. Its a good idea to get a shop manual for this car. This car is a pleasure to fix . After you pull relay for pump get a voltmeter and test the circuit for B+ (don't forget to put key in ignition and turn to the on position.
If you get B+ here switch is ok most likely relay is the culprit.
Remember there are two fuel pumps for this vehicle
One in the tank (accessable via trunk lift carpet and its in the right corner) the other under the car by the tank. have fun and good luck

not the fuel relay. the pump may not have enough psi to pump properly. and you ould have a blocked fuel filter/ ethanpl das has been none to clog lines,fuel pumps, and emissions.and injectors. <p>
Change out your fuel filter first. Add a can of SEAFOAM to you fuel(parts stores). after changing filter. let SF sit in tank for 10-20 minutes in fuel. It will help dry the water that ethanol produces..,<p>
If it turns over faster, and wants to start, that is a sign of EGS(ethanol gas syndrome)/ let it sit another 20 minutes and try to start. If it won't fire through the injectors, replace the regulator(which is also damaged), and that should fix it. Also have a psi done on your fuel pump. good luck

fuel filter might be on backwards. arrow should point to the front of the car. brass washers have to be replace also.

you went this far you may as well change your fuel pump relay