Where is the diverter valve located on a 1991 Ford F150 5.0?
My mechanic said I need a diverter valve. He also said it is in a difficult spot to put in? He closed his shop, so he can't help me anymore. I can get the part but not too sure where it is located. It is part of the exhaust system.
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Output speed sensors are externally mounted, but can be located in a difficult spot to access. No gaskets are needed, the new sensor should come with a new o-ring seal. Just make sure everything is very clean, and put a little vaseline on the o-ring and sensor port opening
its located at the back of the engine near the firewall. it has a large hose connected to it(3/8") if I remember right. it is attached to top of the PCV valve. pull the hose off then you can pull the valve out of the rubber grommet that holds it into the engine.
The EGR valve is in a very difficult spot to work on. If the EGR is bad it will set off the check engine light and make the vehicle run rough or stall at idle. It really doesn't make it run rough while driving or accelerating. What are the conditions when the car runs rough?
On 3.5L engines, the PCV Valve is located on the rear valve cover (see pictures bellow). Please note: the PCV valve must be replaced if it's removed. Access to the valve is easier if you remove the upper intake manifold. However, this is not absolutely necessary and if you are already a little mechanically inclined you can do it the way you would replaced any other PCV valve.
-A 19mm open wrench will make your life a lot easier if the PCV valve is a bit tight. It is in an awkward spot to apply pressure.
-Disconnect the electrical connector from the valve. There is a small pin or locking device on the wire that you will have to slightly depress for the connector to release.
-Disconnect the hose from the valve and turn the hose clockwise so that you have a bit of room to work with.
-Turn the PCV valve counterclockwise and remove from the valve cover. Pay close attention to the position of the valve at the point when it is to be removed. The new PCV valve will go in at that same position. Why is this important? It is possible to install the PCV valve facing in the opposite direction. Once the PCV valve in and locked it in place, it damages the locking mechanism. Therefore, if you remove it you will have to throw it away and purchase a new one.
-You just saved $130 - $150 to have the PCV replaced at the dealership...
If you have dual tanks, like I have, the there is a mechanical fuel selector valve that both tanks hook to. When it fails, it usually fails so you can't get fuel out of the front tank. If you haven't tried yet, put some fuel in the back tank and give it a try. If the truck runs again, you need to swap out the shuttle valve.
There may be some kind of obstruction in the duct work. Or, there may be a vacuum leak in the small tubes that operate the diverter that "tells" the warm air where to go. Have you checked to see if the air flow is coming out the floor vents?