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Join Date: May 2001
Location: Central Coast
Posts: 281
pulse/duty factor: How to measure

I'd like to measure the pulse/duty cycle on my 911 Turbo. Does anyone know where to tap in to take the reading??

Old 03-11-2002, 11:06 AM
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Join Date: May 2001
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bump....anybody, anybody???
Old 03-11-2002, 02:57 PM
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Join Date: Aug 2001
Location: Brighton UK since 11/2012
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The easiest way is to use the Bosch Hammer, it has a special function for CO adjustment on 964 Turbos.
Failing that you need to tie into the output wire of the O2 sensor.
If you measure in Mv, it should sweep from low to high in a 0.5v range when up to normal temperature.
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Old 03-11-2002, 03:02 PM
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On my car, there is a round test plug with a rubber cap. Take the cap off and see three conductors in a triangle. The brown is ground and the green will give you the Oxygen Sensor Duty Cycle. This round plug is between the engine compartment fuse box and the fuel accumulator, just dangling there.

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Old 03-11-2002, 04:07 PM
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