In an effort to learn about the F150’s, I have read many posts to garner as much information as possible. One troublesome item keeps cropping up. The EGR system. Primarily the focus is on carbon contamination introduced by the recirculation of exhaust gasses via the PCV. Has anyone tried a filter, separator or accumulator placed inline with the PCV to remove particulates before gas induction? Alternatively, is this too far out of the box?

 

sounds interesting.

But in my experience, its been the DPFE sensors and solenoid that goi out, not a EGR valve going bad too often... Besides, you can always pull that off and clean it...

 

Just thinking which typically gets me in trouble.

 

Please note that I'm not an expert on this.

The recirculated exhaust gasses are from the driver side exhaust. The positive crankcase ventilator allows excess air to exit the crankcase and is sent to the throttle body elbow where is can be mixed with intake air and burned in combustion.

I just put a new EGR valve on yesterday. I didn't have an indication that it was bad but I'm running out of possible causes for my steady decline in fuel mileage. When you look at the EGR, you can tell it's a pretty simple part. Vaccum holds up a piston with a stopper on the end allowing some exhaust to be mixed with combustion air. If there isn't vaccum, like at full throttle, then the piston will drop stopping the ehaust gas, and allowing only fresh clean air. On mine there was carbon on the piston. It appears that the piston hadn't moved for some time. If that's the case then no exhaust gasses would have been recirculated. I'm not sure how this would effect fuel mileage, but I hope that it gets better.

I too looked for information on the EGR before I replaced mine. A search brought up a lot of threads with EGR in them but not a lot of useful information. Maybe some one will post something useful here.

 

well? Did you notice anything? Why did you replace it and not just clean the one you already had once off? Was it cracked?

 

I didn't see anything wrong with it other than the carbon on the inside. I suppose I could have just cleaned it off and put it back. My job requires me to disassemble and reassemble things often. I've found that it a good idea to have a replacement just in case something goes wrong. I had the replacement before I took anything off. Once I got the EGR off I decided that I would install the new one and clean the old on to have as a stand by. Yes, I realize that it's a costly way to do it but it's been my experiance that spending a few bucks now can save several later.

I changed the EGR as a possible remedy for the declining fuel mileage. I've already changed the O2 sensors and fuel filter. I won't be able to tell if there is a difference untill I've used a tank of gas. I'm going on a trip this weekend so I'll be able to tell soon.

 

I found this on ebay, I have not tryed it yet, but it looks like it takes care of the problem and is not alot of money. link at the bottom

Lightning / Harley

PCV VALVE KIT




Does your Lightning / Harley use oil?

Does it leak oil from the intake boot or spray oil all over the throttle body?

If you answered YES to any/all of the above then consider this:



The PCV valve that came as OEM equipment in your Ford Lightning’s supercharged motor is supposed to keep the crank case oil from entering the intake manifold under normal driving conditions during which the intake manifold is running in a normally aspirated vacuum mode with un-pressurized cylinders.
In this positive vacuum mode any oil coming through the stock PVC valve would drop back into the passenger’s side cam (valve) cover from gravity.

However under an opening throttle especially in a positive boost mode (pressurizing the cylinders) the airflow in the PVC system of the supercharged motor is being reversed and instead of pulling the crank case vapors out under vacuum as normally would be the case, it is instead sucking the intake air through the PCV circuit and PCV valve in a reversed flow direction.

As the engines need for air increases the suction at the mouth of the throttle body increases such that the PCV tube leading from the drivers side cam cover to the intake boot (the crank case PCV air inlet tube) is placed under a reversed vacuum and literally sucks the oil laden air out of the drivers side cam cover and into the intake boot area.

The PCV valve should stop this airflow reversal but Ford used an OEM PCV valve in their supercharged Lightning & Harley motors that never closes at anytime no matter which way the air happens to be flowing.

I am sure that the Ford Engineers had their reasoning, could it possibly have been so the supercharged motor passed the Federal emission standards?

When the boost becomes positive the airflow through the throttle body and into the plenum above the blower increases causing this reversal of the PCV systems airflow. The use of a proper PCV valve, or as found in our kit two PCV valves, would stop this reverse air flow and probably should have been considered as OEM equipment to be installed at the factory.

However since the factory PCV valve doesn’t close at anytime to seal off the airflow in either direction (no check valve here to stop the air flow) the reversed airflow comes up through the plastic PCV tube that leads into the air intake boot and sprays oil all over the throttle body even forming puddles in the boot. The oil draw with the stock Ford PCV system is pretty much constant, increasing as the engines RPMs increase.

After installing our PCV Valve kit, you will find that there will be little to no oil residue in the air intake boot nor being sprayed all over the throttle body and thusly coating the plenum chamber above the blower. Our PCV valve kit allows the pressure to be released out of the driver's side cam cover and will prevent the PCV circuit from flowing air in the reverse direction.





PCV Kit



"Comes with complete instructions"


this is the link that will take you to the item


http://cgi.ebay.com/ebaymotors/ws/eB...category=46098

 

Wit,
The EGR looks pretty straightforward to remove,
Any tips on removal or is it as easy as it looks?

 

Where is it, and how do you clean it?? Pics??

 

yes, its as easy as it looks.


I posted a picture in here. Clean it like you would a carburator or fuel injection, also use your imagination to get other junk off when you look at it...

https://www.f150online.com/forums/sh...d.php?t=203615

 

I removed mine and replaced with a new one.
Still havent solved my misfire problem. But have eliminated the EGR.
I also cleaned throttle body and checked and rechecked all vacuum lines.
What could be doing this. Should I go after the coil packs and plugs next?
Also, Am I doing any harm to the engine driving it like this. I have about 500 miles to do in the next three days and am concerned aobut causing permanent damage

 

Interesting information. I was hoping to patent an idea I had, but I see it has already out there. Oh well…