vacuum lost at low idle- PS, AC, PB

[willyt4r]

From the FSM, I should have a RPM kick up for the AC and PS and Power brakes. I have checked the the VSV valves they have tested within specs. The question remains why would I have a loss of power steering, power brakes , and AC? 1991 4WD 3.0 3000 miles on a fresh engine.
Thank you:violin:

 

[4runner_kid]

From the FSM, I should have a RPM kick up for the AC and PS and Power brakes. I have checked the the VSV valves they have tested within specs. The question remains why would I have a loss of power steering, power brakes , and AC? 1991 4WD 3.0 3000 miles on a fresh engine.
Thank you:violin:

You check the valve on the bottom of the power steering pump? How about the brake booster itself?

 

[fourwd1]

The idle up for the AC and PS are 2 separate things.
Common to all 3 is engine vacuum, start looking for a leak or misconnected hose.

 

[bruiser67]

loss of power in 92 3.0 V6 after new engine

hey

am trying to diagnose my loss of power. have multitude of VSVs but 2 coming directly off the manifold outlet. what colour VSV is for which? Also, the third off take goes off to a manifold which it would appears has a multitude of feeds. Is there a vacuum drawing for the 92 V6 3.0L unit with AC and PS? some of these? there is a partcular couple of items i am not sure what they are for.

any help would be good. will post a photo in a few days.:moping:

 

[RotaMan2]

There is also and adjustment valve for both of those (ps, ac) on the fenderwell. see if that is your problem.