Hi, I'm new to toyotas and trucks in general. I was looking over the engine and found the egr valve was not hooked up to vacuum. The line that is suppose to go to the egr goes to a little round thing off the manifold with three vacuum inlets, with two blocked off. But I can't find that thing any where in the vacuum diagrams. I can't find any other areas where a vacuum line is missing. I am at a lost. Here is a picture to better explain




I've learned alot so far by searching this site and others. Thanks for you help

 

The EGR modulator (round thing on the valve cover) attaches to the lines off the throttle body and the BVSV that siits under the throttle body and is temperature controlled. The hard lines along side the valve cover carry those vacuum lines back and they pretty much connect such that you have no vacuum lines crossing over each other:

http://www.4crawler.com/4x4/CheapTri...ine_Pix/1.html

A Factory Service Manual will have the detailed connections.

 

thank you for the link to the pictures that helped alot.

Quick question the sensor in the bottom right of the picture, is there a cap on the back line? also on the VSV is it capped on the back?

http://www.4crawler.com/4x4/CheapTri...ine_Pix/8.html

Mine has a line from the back line to the VSV and no cap on the back of the VSV. I think this might be why my truck has problems starting. Thanks for your help.

 

The VSV is a Vacuum Switching Valve, basically a "vacuum relay". The cap is not a cap, just an air filter. That VSV is one that lets outside air into the line (via the filter medium in the "cap) when no power is applied and when power is applied, it sends vacuum from the manifold to the output line. In that lower right VSV, that is the idle-up VSV and valve for the A/C and power steering systems. All it does is bump the idle speed up whenever the A/C or poswer steering is needed at idle. Has no affect on starting.

 

 

That is the diagrams i was using, it doesn't show all of the vacuum lines. But I have it all good now. thanks

 

I'd help you out but I don't have that hose anymore...