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firmware/controllers/engine_cycle/rpm_calculator.cpp

@@ -320,6 +320,7 @@ static void tdcMarkCallback(trigger_event_e ckpSignalType,
 		// todo: use tooth event-based scheduling, not just time-based scheduling
 		if (isValidRpm(rpm)) {
 			angle_t tdcPosition = tdcPosition();
+			// we need a positive angle offset here
 			fixAngle(tdcPosition, "tdcPosition", CUSTOM_ERR_6553);
 			scheduleByAngle(&tdcScheduler[revIndex2], edgeTimestamp, tdcPosition,
 					{ onTdcCallback, engine } PASS_ENGINE_PARAMETER_SUFFIX);

firmware/controllers/trigger/decoders/trigger_mazda.h

@@ -19,5 +19,9 @@ void configureMazdaProtegeSOHC(TriggerWaveform *s);
 void configureMazdaProtegeLx(TriggerWaveform *s);
 void initialize_Mazda_Engine_z5_Shape(TriggerWaveform *s);
 
-// TT_MIATA_NB2_VVT_CAM
+/**
+ * TT_MIATA_NB2_VVT_CAM
+ * if you unplug VVT you can start & run your engine on it
+ * trigger offset "-90" seems to be doing the job
+ */
 void initializeMazdaMiataVVtCamShape(TriggerWaveform *s);