Idle adjustment on 22re dosn't do anything

[RatLabGuy]

'89 Toy 22re 4Cyl.
Has the little screw on the front right behind the throttle body for adjusting the idle speed.
Idle is a bit lopey, won't high-idle and it visibly shakes (which could be old motor mounts too).
When I adjust the screw - no change in behavior between being fully in, and almost all the way out (if I pull it out too far it sucks air into the hole and dies).

Poor vacuum?
It's been sitting awhile w/ only occasional cranks and 'round the block' drives.

 

[grapehead]

Are you firing on all 4 cylinders? Mine behaved similarly when I had a bad injector.

 

[RatLabGuy]

Are you firing on all 4 cylinders? Mine behaved similarly when I had a bad injector.

I *think* so. But I haven't tried yanking plug wires, may try tonight.

 

[Fabrik8]

You've probably got a sensor or injector problem. Take off your idle air control valve and clean it too, there's often a screen on it that gets gunked up and restricts throttle plate bypass airflow.

 

[RatLabGuy]

You've probably got a sensor or injector problem. Take off your idle air control valve and clean it too, there's often a screen on it that gets gunked up and restricts throttle plate bypass airflow.

remind me again where that is?

 

[Fabrik8]

remind me again where that is?

Mounted to the throttle body, as it bypasses air across the throttle plate. I think it's under the throttle body on the 22RE from what the interwebs say.

 

[RatLabGuy]

Oh yes I recall now. I'll give that thing an good look over.