Idle issue on an 89 sidekick 8v

[Freaky Beanie]

note how all things Suzuki missed in that drawring I added.
3speed trans vacuum reg, can leak. or its hose. Mine is Manual.
the DP port to VSV can fail and missing in the drawing but I added it.
booster hose added by me, it sure can leak and belongs here. added. I closed this off for testing
the EGR base gasket leaks, or is missing or as many saw, 30 years later, the whole EGR casing cracked and sucks air like mad. I checked
this gasket and it looked ok. No signs of wear.
the 91 adds the air bleed screw.
the 91 adds water heating to the ISC valve not for it but to heat the whole TB up faster. 91 to 95 8v.
the 89 uses the throttle stop screw, instead of the bleed screw, making idle duty cycle calibration 10x more easy, in 1991. up yes 91 and up, this screw shouldn't be
touched