sensors

bart simpson · 25-09-09, 03:34 PM

Hi, taken out ignition timing sensor and rpm sensor and these to sensors look identical and even have the same part numbers does anyone know for sure these are the the same sensors used in the audi 200 quattro turbo

.regards Bart. also where can you buy a knock sensor for this car in the uk.?

Woodsman · 23-10-09, 08:45 PM

I tested the output of my knock sensor today,
the results I got were as follows

1000rpm 0.001V
2000rpm 0.010V
3000rpm 0.025V
4000rpm 0.075V
I couldnt go any higher as she wears only a downpipe at the mo, don't think the neighbours were impressed at all

with the engine running approx 3000rpm I could get the voltage to go up to 0.030V by tapping the cyl head with a 10mm allen key

with the engine off I was getting 0-0.012V by lightly tapping the sensor, didn't want to hit it hard though.

These are all AC voltages, and you really need a decent multimeter with a memory to see the peaks. Also measured with ecu connected, I would expect to see higher if the sensor were tested without a load,

Does anyone have any figures/ proper test procedures for these sensors?

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23-10-09, 08:45 PM	#2
Woodsman Grown up member Join Date: Apr 2009 Posts: 92	I tested the output of my knock sensor today, the results I got were as follows 1000rpm 0.001V 2000rpm 0.010V 3000rpm 0.025V 4000rpm 0.075V I couldnt go any higher as she wears only a downpipe at the mo, don't think the neighbours were impressed at all with the engine running approx 3000rpm I could get the voltage to go up to 0.030V by tapping the cyl head with a 10mm allen key with the engine off I was getting 0-0.012V by lightly tapping the sensor, didn't want to hit it hard though. These are all AC voltages, and you really need a decent multimeter with a memory to see the peaks. Also measured with ecu connected, I would expect to see higher if the sensor were tested without a load, Does anyone have any figures/ proper test procedures for these sensors?