[urq] hesitation, bucking on takeoff - not resolved yet!
Lawson, Dave
dlawson at ball.com
Thu Oct 20 10:11:21 EDT 2005
>Do these even come into play once the engine is started? I thought
>once the engine "synced up" Hall,TDC and Ref sensors, that the only one
>that is really used from that point on is the Hall sensor.
Once the engine is started, the hall sensor may be disconnected. But the
ECU needs the ref mark sensor and the timing(speed) sensor in order to
determine
engine position. It reads the ref mark sensor (60 deg BTDC) and then
counts
flywheel teeth to determine engine position for timing. I would perform
the
checks on pages 32-34 of the IST manual and verify functionality of the
speed
and ref sensors.
-
Dave
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