Hi.

unfortunately I did not take a picture when I removed the EGR-Solenoid of a '85 C4. Could anyone help me out where blue should be connectred to? Does look like it is made for a small rubber hose ...



As far as I know red and green should be connected to the plenum and EGR-Valve.

 

Nothing is connected to the place you marked blue. At least nothing is connected there on my 85.

 

The only thing on the blue port was a little piece of foam filter that probably disintegrated long ago.

 

Indeed it is the air bleed port.

 

What's interesting about these EGR vacuum solenoids is they are open when static, meaning the ports allow air to flow through them when they are on the bench. I've read a lot of posts where it's stated that the valve should be closed. It's not, it's open until the ECM shuts it. And I believe it pulses it instead of just on or off. If you have it off the car you can blow through it. Put 12vdc on it and it closes. I don't think the solenoid pictured is available anymore. I just installed one on an '85 today, it's from a 92-96 Vette. I had to install a new wiring connector and cut the plastic line and the molded rubber connector off the car's plastic vacuum hoses to slip rubber vacuum hose on the plastic lines so they could be connected to the new solenoid ports. The new solenoid ports are closer together and the molded rubber connector won't fit. There have been a lot of posts about these EGR solenoids. The later Vette solenoids work with modifications. I have one on my 80's Camaro that uses the same molded rubber piece but I couldn't find a replacement for that one either. One of the Vette part houses sells one to fit with the same mods I made. Here's a link... http://www.volvette.com/4EN40D.html . I actually bought a EVS34 for $21.99 from Auto Zone and modded it. It's the same solenoid. I probably didn't add much to this thread. Maybe I should create a new one since this is an issue some members are dealing with. Have fun.

Art

 

Where exactly do the green and red line tube connects to? They are lost on mine for some reason.
Thank you

 

I think that's a great idea and would benefit a lot of people on the forum. There's a lot of parts that are no longer made and becoming difficult to find and these types of modifications are a necessity. Especially for us early C4 owners where some parts are one or two year only pieces.

 

The hole on the left goes to a vacuum port on the bottom of the throttle body. The hole on the right goes to the EGR valve. You also need the connection to the ECM to make it all work.

 

That helped me a lot.
Thank you very much

 

My 89 has a small rubber boot attached to a plastic air tube at a 90deg angle.

 

 

. Where do I get the connector or do you have a part numbers

 

Are you referring to the electrical or vacuum connector?