Fixed Orifice Tube (8.0L) 1. A fixed orifice tube CCV system performs same function as a conventional PCV system, but does not use a vacuum controlled PCV valve. Ensure locations of fixed orifice fitting and air inlet fitting have not been exchanged. 2. Fixed orifice fitting may be Gray in color and air inlet fitting may be Black in color. The fixed orifice fitting is located on right side valve cover. 3. Remove fixed orifice fitting from valve cover and leave tube attached. Start engine and let idle. A hissing noise should be heard from fixed orifice fitting. Also, a strong vacuum should be felt with a finger placed at fitting inlet. If vacuum is not present, remove fitting. If vacuum is now present at tube, replace fitting. Do not attempt to clean fitting. If vacuum is not present at tube, go to next step. 4. Check tube for kinks or obstruction. Clean tube fitting at intake manifold, if necessary. A 1/4" drill may be used (by hand) to dislodge any solid particles. Reinstall fixed orifice fitting and tube. Disconnect air inlet fitting and hose from front of valve cover. 5. Hold a piece of stiff paper loosely over opening in valve cover. Allow engine to idle for one minute. Paper should be drawn against rubber grommet in valve cover by vacuum in crankcase. If vacuum is not present, check tubes for restrictions or obstructions. Positive Crankcase Ventilation Valve (Except 8.0L) 1. Disconnect hose from Positive Crankcase Ventilation (PCV) valve. PCV valve is located on engine oil filler tube. Rotate PCV valve downward until locating tabs on PCV valve align with slots on filler tube. Nipple on PCV valve should now be pointing downward. Remove PCV valve. Check condition of PCV valve "O" ring and replace as necessary. 2. Reconnect hose to PCV valve. Start engine and allow it to idle. If valve is functioning properly, a hissing sound will be heard as air passes through valve. Place finger over PCV valve inlet. A strong vacuum should be felt at valve inlet. If vacuum is not felt, turn ignition off and go to next step. If vacuum is felt, turn ignition off and go to step 4 . 3. Disconnect hose from PCV valve. Remove and shake PCV valve to ensure a metallic clicking noise can be heard, indicating valve is free. If valve is not free, do not attempt to clean PCV valve. Replace valve. If PCV valve is free, check for obstructions or kinks in PCV valve hose. If hose is okay, check for plugged vacuum fitting at rear of intake manifold. Repair vacuum fitting as necessary and go to next step. 4. Reinstall PCV valve. Disconnect fresh air hose from air cleaner resonator on top of engine. Start engine and allow it to idle. Hold a piece of stiff paper over fresh air hose opening. After allowing about one minute for crankcase pressure stabilization, paper should be drawn against opening. If paper is held against opening, system is functioning properly. If paper is not held against opening, check hoses/tubes and crankcase breathers for restrictions. Repair PCV system as necessary.
This is for ram van not caravan, you didnt spcify?