In my previous post I discovered proof my EGR system is clogged. I was getting an error code that indicated it. This was really no surprise to me since the previous owner suspected it to be clogged. In the photo I labeled several items referenced here.

My question is this. What do I have to dissemble to clean this out?

I assume I must remove "Nut Set 1".

Should I take off "Nut Set 2?"

I am guessing the "Pipe" is clogged with carbon, and needs flushing. Can I remove the "Pipe Nut" and make just shoot down some carbon cleaner? Or will that clog my cats?

I tried this when I first got the truck but I could not break the seal on the "Pipe Nut"

How do I remove the "Pipe" from the exhaust manifold?
What gaskets do I need to replace?

 

Honestly, you should take all of it apart and clean it. If you don't take the position sensor off, the chemicals you use to get into it will probably damage that sensor.

Also, try looking around on advance auto or ebay for a brand new EGR if it's within your budget. You can find a great deal if you do some competitive shopping. That's what I ended up doing.

 

Don't be so sure.

 

I have already committed to pulling this apart. My question is how to get the bugger off? Where do I start?

 

get another f150 tie it tight and floor it do what i do just undo everything use an old egg carton to catalog everything that comes off take plenty of pictures then clean it all up nice and shiny the use the pictures to put it back

 

just from that picture remove the sensor, remove the pipe nut then remove nut set 2 then 1 as for the egr tube it was welded in place on my old exhaust but sea foam down the egr shouldn't clog the cat at all if anything clean it up some then put it back together run it to burn up the sea foam.

 

Okay, I managed to get it apart. I had to use an old rusty pipe from the Probe to get some extra leverage on the pipe nut.

Once apart it all seems fine. The passage from the exhaust has a small, umm I don't know what to call it. (See pic) That thing does not move at all. When I shot in carb cleaner to flush it, not much came out. I did notice that the input from the exhaust side is water tight. I shot in a lot of fluid and just watched it sit there, not leaking into the other chamber. I also tried sucking on the vacuum nipple, and it did cause the spring to compress some. All the rubber of the diaphragm seems to be fine. No cracks or dry rot.

I tested the vacuum going to it by holding my finger on it, and revving up to 2000RPM. However there was not much suction. How much suction should there be?

 

Quite a lot man. Follow the line back to the EGR solenoid and take that off and clean it as well.

 

that vacuum line just goes over to the piece next to the coil, that has a green line and black line, correct? reason i ask, is mine has the same vacuum deficiency
(conveniently had a picture of it, from when i broke a vacuum line)

 

Yes that is the egr vacuum solenoid. It can get dirty and not work properly also.