yeah wideband sensor is in the stock gc8 location - right behind the turbo

so have you tuned link ecu's using pclink before?

keen for a play?

edit: sounds like this is where it needs a little fine tuning:


There is always a delay between an injector being energised and the injector actually opening. Likewise, there is a small delay between the injector being de-energised and the injector closing. Because the opening time is considerably longer than the closing time, the overall result is that less fuel will flow for a given pulse width than would be expected with an 'ideal' injector'

To compensate for this PC Link increases the injector pulse widths to compensate for this 'dead-time'. The dead-time for a given injector is a function of the battery voltage, differential fuel pressure and the type of injector control (saturation or peak and hold). A typical dead-time at 3Bar differential fuel pressure and 14 volts is just under 1ms (ms = millisecond = 1 thousandth of a second).


In applications with a linear 1:1 fuel pressure regulator (ie not a rising rate regulator), the differential fuel pressure (difference between manifold pressure and fuel pressure) will be constant. Therefore the only variable that can change, thus affecting the injector dead time, is the battery voltage (this can change with electrical load - e.g. when the air conditioning or lights are switched on - and sometimes engine speed).


Without correction, the changes in dead time will cause the engine to run lean when the voltage drops. If the Injector Voltage Correction is properly setup then changes in the battery voltage will not affect the air/fuel ratio.


The injector dead-time table in PC Link allows the dead-time for different battery voltages to be entered. The values represent the dead-time in milliseconds. These should increase with falling system voltage. Dead time values for a particular injector can be entered directly or a preset Injector Type selected.