after recently changing back to wasted spark ignition,
and getting it running, I still have problems..
idling is fine, but when revving or keeping at a higher rpm I can see with the strobe light,
that sometimes the timing flashes on TDC (like a reset) suddenly and then for example 20 deg btc again.
I am just running ignition only direct fire wasted spark.
I insulated all open not used wires not to get some faulty connection....
I just have the power supply connected, 3 wires to the ford coil and the wire to the VR sensor.
driving like this is a nightmare... i think due to the late ignition event (at tdc) the fuel ignites in the exhaust,
the neighbours are starting to hate me

checked and double check the wires, vr sensor polarity, etc, but it looks fine.
also check with another vr sensor but same..
never had this problem before with my other megasquirts
somebody seen this by any chance?

Peter