Hi George,
Have you tested the vacuum on the vehicle? Low vacuum will cause you all sorts of emission/idling problems on a Fiat with a MAP fitted? Another check is the valve timing (this should however show on your Vacuum readings) 16v Fiats can easilly be set incorrectly and can also cause emission/idling faults? Please also remember that continuity testing of a length of cable either side of a connector is not a valid test for diagnostic purposes! A cable might show continuity, but it does not mean that it is able to carry a current, ie: A stepper motor requires a good supply of voltage & draws a fair current, but your cable may have been chopped to say 2 or 3 strands of wire within the connector, hence you will have continuity as the two cables are connected to one another, but 2 or 3 strands will not be able to carry a good current or supply a good clean ground???? this may also be a cause of idle/emission problems as well? Sorry to have gone on a bit, but I hope that this has been of help to yourself George,
Gunner.