i have issues with the starting of my engine. no ecu error, once the engine is started it run perfectly. The sync sensors produce a +Ve (5v) when the tooth enter the sensor and 0v when leave sensor, the cylinder pulses produce a -Ve (0v) when the tooth enter the sensor and 5v when leave it. Both are hall effect.

setup used:
SMC ecu has dwell board inside
2 bosch ignition modules 0 227 100 137
bosh 2X2 double fire coil 0 221 503 407
injectors bosch 0280150034
wasted spark
gear tooth wheel - 2 teeth

engine is Porsche 914 flat4

here is tow video links where you can see all monitor smc software and hear the engine during cranking. start-1 https://www.youtube.com/watch?v=gdpGMwFxVlA is a cold starting and start-2 https://www.youtube.com/watch?v=uUehuDcDfPE another start after 10min.

I remarked that sometime the engine start fastly than video start-1 but with one cylinder less as for me (during 3 or 4 secondes) then all the cylinders work. Unfortunately the laptop was not logged when the problem occured.

please anyone can help me about that?

Attached Files