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Square wave output for Cylinder 1 TDC

David Tychsen-Smith

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I require a squarewave output to indicate when cylinder number 1 is firing or at TDC to input to another device. As I am using a G4 ecu on a 6 cylinder engine and only have 4 ignition drivers I'm running wasted spark, so taking a signal from ignition driver 1 will only tell me if cylinder 1 or 6 is firing. Can I use a spare injector driver to produce a squarewave that changes state at cylinder number 1 firing or TDC?

Thanks for your time, any assistance would be much appreciated.



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Hi Simon,

Thanks for the quick reply.

It needs to be timed accurately, preferably to Cyl1 ignition firing. Is there any way to configure an output to perform in this manner? Or possibly a way of distinguishing between Cyl1 / Cyl6? I could try combine this with the coil driver output and extract the signal. 

Thanks again for your assistance,


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