[impreza gearbox conversion problem]

hi benny.  i dident swap to manual car because they almost dont exist in in our country... 

[impreza gearbox conversion problem]

hello everyone...

i have an impreza 2008 hatchback 2.0L 4x4 that i converted from 4 speed AT to 5 speed manual.

i solved all the mechanical adaption challenges and the car is driving...

my problem is with the throttle, it doesn't open over 30% (opens 100% and immediately closes 70%) .It is  actually stuck in safe mode and accelerates slowly because  the AT gearbox is disconnected.

i replaced the ecu with the complete lock set (ecu, body control unit, instrument panel, keys & switch) taken from the same model but with a manual gearbox.

unfortunately it doesn't help and the issue remains the same, the clutch and neutral switches are also missing... my suspicion is the harnesses are different between AT & MT models.

when connecting lunch diagnostic to OBD the trouble code is: P0600 serial communication link...

I would appreciate any advice to solve this problem