Quote:
Originally Posted by 911hillclimber
Yep, the XDi box, now tested by Electromotive in Virginia, and deemed trouble-free on testing did not 'see' the VR sensor. Never has in my hands.
You can see the VR sensor output. It looks good to my untrained eyes.
Wires all there and in the right places and connected, tested from the 23 pin plug that would fit to the XDi box through to where the wires go in the system.
What can be wrong?
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Did you read post #30? Did I describe how the XDI functions? If not, what's your understanding? Did XDI describe how their system functions?
If my functional description in post #30 is correct, the XDI ECU is receiving the TDC signal, but is unable to lock-on to the correct timing.
Most likely it's not detecting a change in engine RPM during the setup time, while the engine is cranking.
The key question is whether you get any spark. If your don't, then the ECU doesn't detect the crank sensor signal. You must have a spark to all cylinders while cranking.