crazy_redneck

im not getting vacuum to my egr valve so i was checking for leaks when i noticed the 3 ports on the throttle body and the 2 that go to the egr modulator and egr have no vacuum are they supposed to its a 1990 toyota 4 runner 3.0 v6

Punchy

Check the green VSV valve on the passenger fender, This is over look alot.
The VSV can sometimes get water in it and rust or plug.

The route the vacuum follows is,, 2 lines from the throttlebody to the EGR modulator (Note a Fat hose from the EGR exhaust tube connecting under the ERG modulator)

Then fro the EGR modulator to a hard tube going under the upper plenum then comes out and connects to the GREEN VSV.
Then from the GREEN VSV back to a hard tube going back under the upper plenum and out right next to the EGR valve.

crazy_redneck

i know that but my question is is there supposed to be vacuum from those 2 ports on the throttle body

justin_4runner

try pulling the lines at the throttle body and see, if so u might have a plugged line, i know i had one and had to by-pass it so mine would work right,

crazy_redneck

yea im not getting any vacuum from the throttle body to the egr

Punchy

Vacuum accures durring throttle, Hook a vaccum gauge. and rev it.

While its running you can try force Carb cleaner back through the vacuum outputs of the throttlebody.