DIY_EFI Digest V4 #567

[William T Wilson]

On Fri, 8 Oct 1999, DIY_EFI Digest wrote:

> >sensor, which means you need the flywheel, transfer case and the actual
> >sensor.
> 
> Surely it doesn't have to be *that* accurate? Why not use the coil? 2 per
> Rev should be enough, you only need speed not accurate position?

No, it does.  You have to have a very good accuracy (I think the minimum
is 6 "steps" per revolution) because otherwise the system will get
confused when the engine changes speed quickly.