4runnerguy

how do u know if the EGR is workin

4runnerguy

some one must know

Targetnut

Use a vacuum pump and pump up the valve with about 10" vacuum while the engine is idling. The engine should run very rough or stall. then connect a vacuum guage to the hose for the EGR valve and goose the throttle You should see the vacuum come up just as the throttle is opened

If this all works, the the EGR should work.

4runnerguy

is there another way. and i dont a a vacuum guage and can i use an vacuum pump that i all ready have under the hood

4runnerguy

eny one

4runnerguy

and i have this thing that once in a wile the rpm drops and comes right back up its a 3.0

Targetnut

If that is the symptom you are trying to diagnose, It is not likely to be related to the EGR function. You could disconnect the EGR and drive around to see if the symptom goes away. And it probably won't.

4runnerguy

do u know waht it could be

to4menon4u

it might be a dead spot or dirty spot in the tps