JTECHSAFF,

Just reread you post above, any failure in the closed loop system
(If there is one) will cause the system to revert to standard maps settings
and run slightly rich across all cylinders.

Besides above about 2 to 3 psi, the closed loop control will be deactivated anyway.

Swapping the injector wires shows it isnt an ecu problem IMO.


Barring any mechanical issues....
The more I think about it, I am going with an ignition related issue.

Did you swap the cap, lead and rotor arm ?