Engine problems


New Member
Hi Guys,

I am building a GT40 using the Modular Mustang engine 4.6 liter with a single overhead cam. I am using an Emerald M3D K6 ECU, I have it connected and put in the various configurations including the Throttle pot. Now the Red light is staying on at the ECU, instead of going to green, and it's not seeing the crank rotation. Could this be due to a faulty crank sensor?
When cranking should I see a DC voltage at the sensor plug?
As a way of checking everything is the sensor polarity sensitive?
Is there a way of testing the sensor?

Any help would be grateful.


Hi Don,
try swopping over the wires on the crank sensor, as they are polarity sensitive. This resolved the issue I had when I was building up my system