Hey guys, im having a bit of problem with my F4.

Im not getting any spark to cylinder nbr 4.
I checked the coil in another position and it fires, ive changed the plugs and ive removed the wiring to the coils and checked for continuity.

Is there a way to check and see if the ECU is sending the signal to the coil to fire? Was planning on sticking a test light on the signal wire and see if it pulses but didnt want to incase that would damage the ECU.

What could cause this problem, dont have a replacement ecu to check so hoping to rule that out esp since its only on nbr 4

thanks

 

There is a way to check the signal, however it would require a meter that can capture Peak voltages. The signals are of very short duration and a standard meter would only read millivolts.

 

Thanks Idodirt. Another question for you. Seems after lots of research my plugs wires are routed incorrectly. The way the are now, nbr 1 is on the right (Clutch side) and nbr 4 on the left (stator side). Yet I'm seeing that the correct firing order is opposite (1 by stator and 4 by clutch). What confuses me is somehow the bike still runs. So which is the correct order and if its wrong now how come it still starts, runs and revs out....