[birdman941]

Well I am still working on this godforsaken BBK dual 65mm TB.
Still had some idle problems, it wouldn't return fully to idle.
I got to thinking that maybe the "hole" in the new TB was too big.
I disconnected the IAC motor as an experiment and the idle returns quickly and normally.
BUT: It turns on the SES light.
I made a new IAC restrictor plate with 2 small holes instead of one large and 1 small, and plugged the IAC mtor back in.
This made no difference. Idle still hangs or returns slowly, and won't return below 1000 RPM.
I made yet another IAC plate with NO holes in it, and it's better. The SES light does not come on, but I really don't like the idea of having the IAC bocked off. It started just fine this morning btw.
Th TB came with a pipe plug to block the "hole" in the back of the unit.
I am going to put the plug in and install the first IAC restrictor plate back in.
If that doesn't work, I plan on drilling a small hole in the pipe plug, (may have to get a brass one to drill it) and re-installing the original IAC restrictor.
Sorry to beat this up, but BBK SHOULD HAVE DONE THEIR OWN ENGINEERING on this unit in the first place.
The car is a lot more responsive than ever, and the SOTP meter says more grunt.
More later. Got to get this figured out.