Hi

My car has started to develop a super rich idle which happens out of the blue
when engaging the clutch or by leaving it to idle for some time.
Requested lambda is 1, there are no leaks, fuel pressure is correct, however it
still goes so rich that it can stall the engine. I am leaning towards a bad throttle
body which closes too much while fuel is injected for the airmass sucked in already.
I've attached a log that clearly shows the issue. Lambda control is trying to keep
it in check but fails as well. If i shut the engine down and restart it right away,
the issue goes away until some time. Does anyone have any idea?

Thanks!

More info on the setup? huge injectors?