I have a vacuum leak somewhere, are there hoses that go into the dash? to the heater system? does anyone have any diagrams that would help me out?

thanks

 

2 in the dash for heater control, other than that thats it for anything but the gas vent outside the engine.

Cap off one at a time from the vacuum tree to find which one you block makes the car run better, when you find it there is your leak

 

i did the pull and cap method on the tree, and nothing made a noticable difference.. i am thinking my EGR valve is stuck open, which would be a vacuum leak.. do you have any ideas on how to check if its operating properly?

 

Take it off and block it from the intake, if it runs fine... there is your issue (if no codes)

 

is there supposed to be a constant supply of vacuum at the egr valve?

 

does anyone have any wiring diagrams for the egr system.. i have vacuum to the solenoid but nothing out.. ever.. so i was wondering if one of the wires was bad, but i dont know where they go

 

EGR opens when your cruising down the hwy