Throttle Body Air Bleed Screw

[fixkick]

G'day,

Looking at trying to adjust my idle speed and reading your posts, I found my idle air bleed screw is mangled beyond adjustment, and looks like fully srewed in.  It's some kind of plastic?

I haven't tried to shift it, is there a replacement or workaround?

1993 8v ,MT.
8 has plastic cap cover (day 1 new) on frong of the TB, throttle body.
once removed cap the screw valve is  steel valve, treads and cone valve inside, like see on old houses, sink water valves (brass) it adjust air flow (bleed) for Duty cycle.
if screwed in fully that is CW, to unscrew it turn CCW.
there is not idle speed adjustment COLD engine  that is the job of IAC, valve on the bottom of the TB. (a thermal valve only based on water temps only) and closes fully at 150F deg.

hot idle speeds are ECU controlled only (based off Engine RPM only)
the bleed screw is to calibrate idle duty cycle of the ISC valve, that the ECU modulates.

if the bleed screw screwed all the way in , is proof that lat person had failng idle speeds and that idle controls are dead.

so idle is racing too fast hot? engine fully warmed up RPM Is 800 +/- 50  RPM  750 to 850RPM is spec, the ISC does that at the commands (modulation) of the ECU.

at hot idle 800
you cam turn on head lamps and heater and the idle holds at 800 and not drop lower RPM and hang low, this is regulation happening via ECU.
rpm raised to 1000
for PS overload, power steering turned in to the rails, hard. or a curb.
A/C turned on or blower.
electric rear glass defroster turned on. 4door car with glass rear and is and option, what car is this you have.

and lots more. I need full symptoms of failure to be accurate.