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Hello, do you remember what the EGR code was? The code number?
On the back of the air intake horn find the vacuum lines that attach to the pcv is it soft and spongy if so replace, when vacuum hits this it sucks closed and results in a hole usually. Follow all the way down to the passenger valve cover to the PCV and look closely. These codes relate to system lean fault with could be caused also from exhaust leak, or a dirty Mass Air Flow sensor which I would remove at the air filter area and spray the 2 little wires in the sensor visible by looking down into the tube with engine and key off. let air dry and then start the truck with same can of cleaner lightly spray around the intake area and listen for a change in the engine.
At a parts store they make CRC mass air flow cleaner that works well. Once the mass air is cleaned you want to disconnect the battery for 10 minutes to reset the fuel trim tables. As stated earlier the rubber hose on the back of the intake. If you look at your EGR pressure sensor it is on the driver side of the intake. You will see two hoses coming from the exhaust. These high temp hoses can become brittle and break. Also if this sensor is aluminum it can rust out. They have been redesigned and are plastic.
Thank you for the info. If any vacuum hoses are brittle you will want to replace them as well.
as needed yes.
Lets leave the egr alone no codes at this time pertain to this.
That's good. Sounds like you have repaired your concern.
You said the EGR pressure sensor is plastic and not aluminum?
Ok so I'm guessing you repaired the EGR code then?
SO WHAT IS GOING ON HERE I WAS REQUESTED IN ON THIS AND SEEM TO HAVE THE RIGHT INFO AND THERFORE SHOULD BE THE ONE RESPONDING.
Thank You I am going to look into this dtc.
Lets check the Egr system pretty straight forward system by the looks of it you can see some data if so great and if you can do some active commands even better. The Egr needs to be checked for vacuum which controls the operation of the valve, follow the green line back to regulator and locate red line at regulator this line is vacuum at all times with engine running. Check vacuum on red hose if good then we need to check the green line to the valve(vacuum pump would be very handy) or run a jumper hose from the red to the green at the regulator and if you leave valve connected with engine running should stumble almost/may stall the engine. if so then we need to look at DPFE pids. If no stumble the remove line and check for vacuum with jumper installed engine running and green line removed from egr valve. If vacuum is there and valve ops seem good then the port in air horn may be plugged, the air horn must me removed to cleaned properly! Not a bad job to do if the case let me know what you find and we can go from there. All these test apply for a vacuum pump tests just no need for jumper or engine running, also if you connect at egr valve during KOER test and monitor gauge will verify vacuum system, let me know.
Good deal sounds like the vacuum repairs are fixing this one. The pcv system unless causing an excessive vacuum leak and the engine could barely run then yes they could be related to egr. Follow these steps with vacuum pump
Sounds good keep me posted.
Any updated info on the truck?
How is the Expedition doing? Have not heard from you.
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