My 2000 1.8ltr gas beetle will not start. We replaced the sensor on the cam but there is still no signal to the fuel pump. All the fuses look good. Any ideas

Listen for the fuel pump running when the key is turned to on, or check for voltage at the fuel pump with a test light or meter. The connector at the fuel pump under the back seat(under a cover with 3 screws) should have 4 wires, the 2 larger guage(diameter) wires are for the pump, the skinny wires are for the sending unit. If there is no signal even then, you may have a bad fuel pump relay.
If it won't start at all, and you also have no spark, you may have a bad engine speed sensor. This is probably more likely and won't set any codes. The engine speed sensor is located on the front of the engine near the bottom, by the oil filter housing. It should be held in place by a single bolt (10mm on the outside with a 5mm allen in the center). The sensor has a short pigtail harness and the connector is clipped into a bracket.
The tach should move when cranking, even if the car won't start. If it doesn't move, it's probably the engine speed sensor.
Checking the sensor with a multimeter is not easy, as it produces an AC signal on 2 of the 3 wires, and I'm not sure which ones.