No, there is no "adjustment".
Powertrain Control Module
where is the PCM located on Mercury Villager 97
Timing is set by the PCM and is not adjustable.
No, there is no "adjustment". PCM operate with pre-programmed firmware that is not designed to be modified, though it can be with special equipment. This is beyond the scope of the home mechanic, and would not be either a necessary or recommended procedure for addressing a problem.
Timing is set by the PCM and is not adjustable.
Timing is set by the PCM and is not adjustable.
No, the speedometer is driven electrically from the PCM.
Unhook the battery for a minute to reset the PCM.
Idle speed is set by the PCM and IS NOT ADJUSTABLE.
PCM, TCM, and internal transmission mechanicals.
Timing is set by the PCM and not adjustable.
There is no such thing. The odometer is electrically driven from the PCM via the vehicle speed sensor. If the odometer has failed you need to replace the cluster.