how can I check a crank trigger signal ?

Yves · Post by **Yves** » Wed May 13, 2015 10:42 am

I have just finished installing my crank trigger wheel and sensor. I tested the sensor while moving the wheel around and seem to get a high and low voltage. Is there some way I can check the correctness of the signal in the ecu while I still run a computer controlled HEI ?

DeadStiff · Post by **DeadStiff** » Wed May 13, 2015 11:54 am

That's what I originally did before I removed my distributer, I even hooked up a coil and laid a spark plug on the block to get my tooth #1 angle correct before starting the engine with the MS.

Yves · Post by **Yves** » Wed May 13, 2015 1:48 pm

Where did you connect the signal from the sensor to ? Normally it goes to the tach input, but that's already taken by the distributor.

DeadStiff · Post by **DeadStiff** » Wed May 13, 2015 3:08 pm

My distributer was still running points.

Yves · Post by **Yves** » Thu May 14, 2015 12:51 am

So that's not going to work for me apparently ?

DaveEFI · Post by **DaveEFI** » Thu May 14, 2015 2:18 am

Yves wrote:I have just finished installing my crank trigger wheel and sensor. I tested the sensor while moving the wheel around and seem to get a high and low voltage. Is there some way I can check the correctness of the signal in the ecu while I still run a computer controlled HEI ?

Switch on, and start a TS log. Then crank the engine. The log should show the RPM signal jump from zero to cranking speed.

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how can I check a crank trigger signal ?

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