I have a 2001 Ram 1500 4x4 5.2L. I just put a new motor in the truck and I have a green vacuum hose that I can't figure out where it goes. The truck starts fine but idles around 1100rpms. C.E. light is on, Autozone scanned, said it was either TPS or IAC, possibily due to a vacuum leak. The green hose is located on the drivers side behind the valve cover and it does not have a vacuum coming out of it, which tells me its suppose to hook to something. Everything that is listed on the diagram under the hood is hooked up.

Thanks for any help

James

 

Check the 4wd. should be two on the intake manifold... couple hoses to the tb.. brake booster... Thats about it..

 

A 2001 ought to still have the vacuum diagram in the engine compartment. If that doesn't help, download the manual:

https://dodgeforum.com/m_340929/tm.htm

you have lines for:
pcv
brakes
front diff.
hvac
emissions
and you may have a line for cruise control

 

I have a two connections on the D/S, one for PCV/one for Brake booster.
One connection on the P/S, it splits off to the Cruise Control, Vacuum Resivoir, Transfer Case, HVAC controls.
I have one connection from the front of the TB that goes to a small canister on the P/S behind the headlight

The hose i can't figure out comes from the T/Case and it's green, it looks like it has a check valve on the end of it.

James

 

On mine, the control line comes off the manifold into a t (1) one end running to the cruise and the other to another t(2). One end of that t(2) runs to a t(3). On that t(3) both lines run through the firewall for hvac. On the other end oft(2) there is another t(4) with both lines going to 4x4 controls. I don't have a vacuum resevoir. Does yours look aftermarket?

 

Any possibilty of taking a few pics and posting? Might help.

 

Mopower: One of the hoses that goes through the firewall connects to the resivoir, its mounted under the cowl on the pass. side.


heres some pics:

http://i84.photobucket.com/albums/k1...4/DSCN0498.jpg

http://i84.photobucket.com/albums/k1...4/DSCN0494.jpg

http://i84.photobucket.com/albums/k1...4/DSCN0497.jpg

 

mine isnt connected either so i dunno man

 

I believe thaton mine, that check valve has aline thatruns behind the motor and goes to t(4). Do you know if the resevoir have a check valve?