I was using a 330ohm resistor.
Changing to a 1K resistor incresead the voltage, but removing the led makes the opposite!
Am i missing something?
That is odd, is the meter hooked directly from the pin to ground? Is the pin staying on (and off) long enough for the reading on the meter to settle (usually a few seconds)?
Are you leaving the resistor in the circuit, connected to ground? That would explain your observations, without the LED the load would be greater. What I meant was to measure the pin with no load, i.e. nothing connected.