Help me AEU86, you're my only hope

[jondee86]

Two things... first, while I have suggested energising the cold start injector
while the engine is running, that would be a last resort action to see if the
sensor/gauge could be forced to show a rich mixture. But as the cold start
injector alone can supply enough fuel to allow the engine to idle with
closed throttle, it would most likely flood the engine unless the throttle
was held open to keep the revs up..

An easier test would be to squirt gasoline or starter fluid into the
throttlebody while the engine is running. That should be all it takes to send
the mixture rich. Probably not even necessary as you have the gauge
working better now with the new sensor.

Second thing, pressurising the crankcase by blocking the vent hose is not
a diagnostic test that I have ever heard of before now While it does
produce a change, running the engine permanently without crankcase
ventilation is not an option as it will lead to oil leaks through gaskets and
seals. Better to let the crankcase breath, either with the RWD throttlebody
or venting to atmosphere.

Third thing (there is always another thing) your fuel pressure gauge is
showing normal pressure and normal reaction to blipping the throttle. So
you are all good there. But I am puzzled as to why the AFR goes lean when
you blip the throttle in your second to last video ?

If I remember correctly, the AFR usually goes rich for a moment after
blipping the throttle, then lean when fuel cut kicks in ? The engine will run
rich after a cold start and then taper back to stoich when warmed up. But
I'm pretty sure that fuel cut is inhibited until the engine gets up to
temperature to avoid cycling due to the high idle caused by the AAV
working. Perhaps Totta can comment on this point.

Cheers... jondee86