Crank sensor question...

[Steve Lamb]

>It has been found that if you swap the wires from the crank sensor, to
>the ignition module, the car pulls like a train from 3000rpm upwards.
>The engines used to run out of steam at around 6000rpm, but with the
>wire swap, it just keeps pulling...
>
>Anyone got any ideas why this works like this?

Going out on a limb.....but........if this a magnetic pick-up type CAS then
you may be changing the ignition timing (??) by doing this.  I know that
some aftermarket ECU's need to be 'told' whether they are triggering on the
rising or falling part of the output signal of the sensor, so it may be
that the ECU is being 'fooled' by reversing the wires into altering the
ignition timing (advanced ??).

Prepared to be shot down in flames big time here.....................


Steve Lamb
Department of Defence, DSTO
Aeronautical and Maritime Research Laboratory
506 Lorimer Street
Fishermans Bend  VIC 3207 Australia

Tel: +61 3 9626 7525
Fax: +61 3 9626 7089

IZCC #180