Re: check engine light / hall field

[Brooks Ellis <brooks@frii.com>]

>>Why is a hall field sensor neccesary anyhow? To control the ignition
<...>

>The timing reference sensor is located at the flywheel. The camshaft turns
>at the half of the speed of the crankshaft, so the computer needs to know
>the position of the camshaft relative to the crankshaft. That's what 

That seems redundant to me - Assuming the belt doesn't slip, the camshaft
will be at the correct position relitive to the crankshaft, won't it? Why
would you need a sensor to tell you that, yes, the camshaft is still there
and still rotating?

I suppose, that if the camshaft is 1/2 the spin of the crankshaft, the
crankshaft would pass a reference point twice per rotation of the camshaft,
and the cam would be in a different position during each pass.

Then wouldn't you want the sensor to be on the camshaft instead of the
flywheel?

>the engine is running for telling which cylinder is knocking in case 
>knocking is detected, though.

hmm.. What does the computer care which cylinder is knocking? It doesn't
have the capability to control each cylinder individually, does it? I
didn't think the 10v had that capability.

>Left side of the engine block. Don't confuse them with oil pressure
>switches. Knock sensor should have red insulators AFAIK.

Oh. Thanks!

And thanks for all the info! I'll see what I can do with it.