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Re: check engine light / hall field

At 15:21 22.06.98 -0600, Brooks Ellis wrote:

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

Yes, you just gave yourself a correct answer.

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

I believe placing the sensor at the flywheel enables more accurate measurment.

>>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.

Yes, it does. It can retard the ignition for individual cylinders

Aleksander Mierzwa
Warsaw, Poland
87 Audi 5000CS turbo (mine)
88 Renault Medallion wagon (mom's)
91 mountain bike (just in case both cars broke at the same time :-)