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Old 04-06-2005, 05:40 PM
A264172 A264172 is offline
Ta ra ra boom de ay
Join Date: Jun 2004
Location: Pittsburgh
Posts: 1,915
On my car, you measure it either at the EHA (with a harness) or at X11 (+ to pin#2 / - to pin#3) fully warmed up.
At X11:
You should get a fluctuating duty cycle (fixed is a fault).
50% fluctuating = stoichiometric
Lower %'s indicate leaning of the base mix
Higher %'s iindicate richening of the base mix

Was that your question?

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
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