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Old 04-22-2003, 06:55 PM
ToreBj ToreBj is offline
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Join Date: Jul 2002
Location: Norway, Oppegard
Posts: 10
Good to see that you haven't given up yet! This reading may not necessarily be influenced by the wrong connection since the multimeter actually is calculating duty-cycle by looking at the "on-time" of the signal. Anyway what you should do is to check your reading with ignition on (not starting the engine). If you see a 70% reading you are ok! If not swap the test connectors to see if it makes a difference.

If your reading was fixed 38 % it could be a fault indication. It is close to 40% which indicates a problem with the connection to the airflow sensor. Also a 50% reading is indication of an inactive O2 sensor, which is what you will have all the time during warm-up (unless you have another sensor problem). Try pulling the coolant sensor connector and you will have a 30% reading.
Tore Bjorndalen

1990 300E

Last edited by ToreBj; 04-22-2003 at 07:02 PM.
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