I never fixed it completely on the st205 but i did have a general running fault which turned out to be a corroded ignitior. It still had the following problem much like the current mr2......Im getting a hesitation feeling on very very gentle throttle at around the
2000rpm mark only. I think its more noticable from cold but to be honest i can feel it all the time. Now only on the mr2 I also find the idle is slightly random.
Starts at 1500rpm from cold and sometimes creeps up to 2000rpm. Drops to 900-950 when warm and occasionally sticks at 1100rpm.Its had new dizzy cap, rotor arm, leads, plugs, coolant temp sensor, lambda sensor.
I physically checked dizzy cap and arm last week to find loose rotor arm thanks to cross threaded screws which i replaced. Car now feels far more responsive in general but the slight niggles remain....only things left to change are dizzy and fuel injectors/regulatorCoolant sensor resistances are all in spec as engine warms up and lamda switching fine.
No air leaks on intake system. No engine error codes. Wiring all checks out and ive cleaned up earth points on top of gearbox and back of inlet manifold
and hot idle is 800rpm! ](./images/smilies/eusa_wall.gif "Brick wall"){kind=small}
