When you need repairing CO potentiometer

[MaxiBoost]

dear friends this answer very late Im sorry.

co adjust working only when car is idle
idle setting is different work on ecu

when car idle ecu not use injection and ignition tables.
its use co trimmer potentiometer for fuel mixture.
also ecu have some small map for idle ignition and some other map (idle valve).
there are run only when car is idle, otherways ecu use std fuel and ignition tables.


why we need rise fuel pressure on Q4 ?
our fuel pressure std 2.5bar.
our fuel injectors 384cc when fuel pressure 3bar.
our ecu is 8bit (range is 0 to 255 raw and 16x16 fuel table)

if we want more power need to rise up fuel pressure
because standard Q4 fuel table max value ~250 already use
(standard Q4 already use injectors %90-%95 duty, high boost and full trottle)
I can not write this ecu fuel table 270 or 310 when I want rise fuel !

I need change injectors OR rise up some fuel pressure and rearrange in ecu fuel map.
finally, if I rise up fuel pressure our idle co trimm setting goes to high, we need adjust it.