Thanks for the Awesome post!. Wife's '95 es300 w/175k had the same "start/die symptom for the last week or so after the car was warm. Took the IACV off but also couldn't get the 4 screws out....even with my dad's old hand impact driver and a #2 (Only got 1 of the 4) stripped em all!!. Said forget this and just squirted out all the holes and butterfly with the right cleaner, blew everything out and put it all back together, all in about 40min. Started her up with no gas or rev and she purred right to an idle. Hope this is a long term fix as i'll do it again in another 100k or so. Got photos if anybody needs them for the early ES300.