I'm having bit of hard time figuring out what is wrong on my friends project that I'm working on.
We are running Ms1 v2.2 029y4a on a Toyota 4 cylinder engine, VAG cop coils, honeywell 1gt101dc on a 12-1 wheel.
For some reason I'm getting only 10-1 signals on tunerstudio teeth logger. I suspected at first that there was something wrong with the
triggering so I changed to new sensor and made new trigger wheel (old wheel was 6-1 and the sensor had become loose and had small scratch in the end).
Still the same, logger shows 10 pulses and one missing. I tried changing to another megasquirt but it's still the same.
So far I have tried 3 different sensors, 3 different megasquirts (all ms1 v2.2), taken relay board off and connected wires directly to megasquirt & added separate relays. Made new project from the scratch and entered all values manually after firmware update. I have tried changing the position of the missing tooth to pretty much all positions.
Below is photo of the signal scoped from the IRQ-1 of the processor. I have tried grounding pulses also, but the result is same.
In the attached datalogs engine is started without spark plugs, also coils / injectors / idle control is disconnected.
When checking with timing light, current setup gives spark a in correct position and spark b about 20-30 degrees btdc.
Did I just miss something from the manual or am I having an actual problem here? To me it seems that for some reason the processor is skipping one of the pulses.