Thread: is this normal?
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Old 09-25-2003, 10:44 AM
nthach nthach is offline
Newbie Benz Driver
Join Date: Dec 2002
Location: Between Oakland and Vallejo, CA
Posts: 253
Originally posted by azhari

Are you sure you're getting 30% key-on, I think it's 70% on Federal cars and Euros (like mine).

Did you use a regular digital multimeter with the formulae or did you use one with a duty-cycle function?

Fixed 50% idle when warm indicates O2 sensor inactive.

If the duty cycle remains fixed at 50% when the car is warm, check the O2 sensor.

The duty cycle should fluctuate once the car is warm if the O2 sensor is working.

Yea, i got 30% key on/engine off(deadhead). I used a Sears multimeter with the duty cycle function.
1984 380SL-driving and service privileges.
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