'89 YJ Wrangler 2.5L Vacuum Line Question

[mtrayno1]

In the second pic I know the line at arrow #1 goes to the air cleaner.  Can anyone tell me where #2 and #3 should go?  first pic is just a close up of the connections in question.

 

Thanks

 

 

 

[Moses Ludel]

mtrayno1...I posted a vacuum diagram for the '87-'90 YJ Wrangler 2.5L four-cylinder engines at an earlier post.  This should help clarify your vacuum circuit: 

Let us know if the PDF diagram helps answer your vacuum concern.  Your circuit is incomplete with the plugged hose.  Here to assist if you need more input.

Moses

[mtrayno1]

Thanks.  I think I've got it sorted out.  #2 goes to Thermal check valve on the air cleaner and #3 goes to the EGR valve.

[don]

Iv'e got 1999 Jeep Wrangler that all of a sudden there is a loud whistle that comes from the throttle body area when the engine gets to operating temperature. Can't 

figure out why. I replaced the gasket. What else can I try?

[Moses Ludel]

Hi, don...Using a spray like WD40 and avoiding any hot or ignition areas that could ignite the spray, safely spray a light mist around the throttle body area and listen for any change in engine speed.  Focus on the area that changes the speed, this would be a vacuum leak.  

We can go from there.  If you need further assistance, post a quick photo of the vacuum leak source.  Let us know what you find.

Moses