My cossie 4x4 idles high (2k rpm) when warm, disconnect ISCV it drops to 900. Took it to a specialist for a quick diagnostic/fix/rolling road tune, unfortunately we couldn't figure out what was wrong with it by the time my slot finished and there was a queue of other folks waiting already...

Bottom line is that the ecu diagnostics report a fault on the TPS and/or MAP sensor.
We tried a new TPS and MAP sensor, cleaned MAP sensor tube, iscv - no difference.

I have since replaced the bulkhead connectors with a proper soldering job, earthed the plenum chamber to the battery and also earthed the ignition amp back to the battery.
Measured continuity from map/tps to ecu and all is fine with ignition on and off.

What else can it be ? Fooked ECU ?