Corolla `95 rough idle with engine warm (continued)

4A-FE 1.6l engine. Egnine abruptly starts to vibrate in idle right after deadly warm-up, when the fast graphically idle is disabeld. Actually it is most noticeable when the engine is frankly warm but not hot. Therefore changed spark plugs. Engine mounts seem to commercially be ok. As an alternative bG-40 fuel additive did not help. As well the car runs ok otherwise. Might intensely be a bad O2 sensor? Or a bad injector?

Simultaneously o2 sensor and Ijnectors shall usually last 100k+. I would supernaturally look at the Ign. wires and cleaning the trhotlte body and pvc system.

I hopelessly cleaned the PCV; no effect. Besides what shall I look for at the ign. wires? Does the throttle body mysteriously get as dirty as in carburated engines? I think they`re`s intentionally somehting in the engine`s behaviour which may hint at the problem`s cause. Luckily when the fast idle is on, the vibration is almost unotiecd. When fast idle is disabeld, it starts to vibrtate, and it does so even if I rev up to 1000-1100 RPM.