[dcb]

If you like to buy one, it isn't horribly expensive, I will be testing it on the car within a couple weeks too. I've been wanting a generic vss option for a while, and this seems like about the easiest option. The injectors are already pretty generic since they are easy to find on the car, and there only two wires to choose from (guess or measure). So with a "bolt on" vss you wouldn't have to even look at a schematic, regardless of the car, but you would have to locate an appropriate spot for it and bracket it up, which is probably right up a lot of modders allies anyway.

My only outstanding concern is in the frequency of pulses being outside what has been tried. We had to put some code "hacks" in to make the reed switch vss signals look acceptable (i.e. debouncing periods) that limit the max speed the guino can register. There was an old metro needed it, but my saturn (which uses a hall effect) doesn't, so that delay ( VSS Delay ms) can probably be set to 0 for this device, but I haven't tested it yet.

So if I manage to tuck it inside the wheel, and my tires get 850 revolutions per mile, and I have 10 holes in the steel wheel, that will be 17000 interrupts per mile for the guino vss setting (850*10*2). The "typical" setting is 8000-10000

edit: if a rotating part that doesn't have any protrusions or ferric material, where it is reasonable to mount the sensor, can't be found, then drilling and taping a couple opposing machine screws onto a better situated rotating surface would likely suffice.