I've had the TH plug in mine for so long I've forgotten how big the hole is! IIRC I erred on the large size of the spectrum. Is it possible that this fix affects the EEC4 & 5 differently? I've had the throttle body off recently and it was hardly carboned up at all. I believe this is a consequence of the EGR restrictor plate I installed. Also, Chris Root advises cleaning the IAC-the Ford manual states that it cannot be cleaned, throw it away and buy a new one. Very interesting.

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95 SE with lots of custom 1 off mods. All design, fabrication and installation by owner.