Crank sensor question...

[Robert Humphris]

I have found an interesting little mod for my type of car ( Renault
5GTTurbo ) which is too simple for words... but I cannot work out why it
works.

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?

Rob Humphris