29-07-2015, 08:00 PM
I wouldn't say that common - could be a failing crank sensor - they're usually pretty immune to interference due to the fact the crank sensors on the 60-2 tooth flywheels are Hall effect sensors, which work off the magnitude of flux, rather than the rate of change as in a VR sensor and output a purely digital signal which is generated by some circuitry inside the sensor itself.
I've known of engines have a real problems with starters with worn brushes affecting the crank synchronisation signals due to their proximity and refuse to start with the starter, but fire instantly when bumped - so wouldn't put it past it. As long as the wiring runs nowhere near the coils/HT leads if you're using them, I'd probably say it's not.
First thing I'd be doing is confirming all the wiring back to the ECU, if not try and get an oscilloscope and watch the signal whilst cranking and running, it should be a perfect signal. The fact that when you're adjusting wiring it fixes it would instantly say to me dodgy connection rather than anything else, though...
I've known of engines have a real problems with starters with worn brushes affecting the crank synchronisation signals due to their proximity and refuse to start with the starter, but fire instantly when bumped - so wouldn't put it past it. As long as the wiring runs nowhere near the coils/HT leads if you're using them, I'd probably say it's not.
First thing I'd be doing is confirming all the wiring back to the ECU, if not try and get an oscilloscope and watch the signal whilst cranking and running, it should be a perfect signal. The fact that when you're adjusting wiring it fixes it would instantly say to me dodgy connection rather than anything else, though...
