I doubt if this is the TPS. That will not cause misfires like this.
Looks like the crankshaft sensor is giving up. Have you checked the gap?
Have you checked the teeth for damage?

Wiring diagram: http://www.bigturbo.co.uk/main6.htm
TPS is on pin 17 of the ecu. (Near) 5.0 volt @ idle, decreasing when you press the throttle.
Also see: http://www.bigturbo.co.uk/main4.htm