OK i still can't figure this out and the dealer has no diagram for this either they had 3 dealer techs looking at it yesterday and they have no idea either
what do you guys think?????

here is the diagram under my hood and the manual see where i circled the vacuum port that says TO BRAKE BOOSTER well my truck is a 3500 and its hydro boot so there is no vacuum and that port is wide open sucking air if i plug it it runs so rich its scary stinks and smokes and I'm not getting a engine light plugged or open do you guys know where it go's????

 

just dig around on your engine and see if you can find something that it goes to.

 

been doing that for days now i think its give up time on the dodge well at least the gas junk

 

Please fill out your profile info. Other than you having a V10 3500, we know nothing else about your truck in order to try and help you. Where did you get that vacuum diagram? I have been trying to find something like that for a long while.

 

As you have a hydro boost brake system which works off your power steering pump you do not need that vacuum port. As you said the PO had it pluged, it should be pluged. Why it runs rough that is something else.

Miami_son: that diag is in the Haynes manual on page6-3 fig1.3c

 

I never said the po had it pluged it's been wide open. I just don't understand whats making it run so rich with no CEL
if its supposed to be plugged then my only guess is it was running rich before and the po plugged the plug to lean it out then.

 

Quote: posted a pic lol its a big pic too post #3 i found the line it's the big cad vacuum line the former owner unhooked it and plugged it now I'm trying to figure out why he did that my 4x4 works and the indicator light works but like i said the only issue I'm having is the clicking in 4x4 only.

I read this and took it as the same vac line.

 

oh yeah i was talking about the axle vent tube i didn't know what it was i thought thats what went on that vacuum lol the plug i was talking about was the white vent plug

 

I went out and looked at mine after you're other post, and the port and hose run to the right (looking from the front) under the air filter..... Then I don't know, could go to the booster I'll check this weekend when I have time to trace it if you want.

 

The hose on mine does indeed go to the front of the brake booster.