So recently due to no start and rough running problems I checked and fixed all vacuum leaks, installed a new power stage and installed a new crank position sensor.
Now it runs a lot better, especially on the move. It's a LOT smoother both during acceleration and on the freeway. However sitting at red lights and such I can notice there's somewhat of a stumble in the idle sometimes. Seems to be when the engine is fully warmed.
Now I plan to clean both the Idle Air Control Valve and the throttle body.
Is there anything else which might cause a little glitch in the idle?
As always, thanks for your input.