I have used a code reader and get no code except 171 and 174... bothe
indicate bank 1 & bank 2 running lean. There is no code shown for the
IMRC. Now here is the deal.... the signal may have been sent to the IMRC
to open its respective valves (runners) but the mechanical arms are not
moving. That is I see no movement when I rev the engine in the driveway.
My opinion is that the days of eyeballing an engine are definitely NOT
over. If I took the control arms off of the IMRC it would not throw a
code even though it was responding to the engine control parameters but
not actually moving the runner controls.