1998 F150 4.6L. Pretty sure EGR is bad. Clogged ports cleaned, DPFE changed, etc. Tried the suck test on EGR, no change. Still getting 401 code. Ports were really bad, so I figure EGR is clogged/bad also.
Here's the problem....I can't get the nut loose that holds the tube from the manifold onto the EGR. It is on the back side of the EGR facing the firewall. Not a whole lot of room to work with, but I can get a 1-1/16 wrench on it. I have tried soaking it in PB, heating the EGR body with propane, beating on it with everything I can find, and it still won't budge.
If I unbolt the EGR from the TB, I have no leverage on it.
Does anyone have a good solution?
Thanks!

 

ANY ideas?!?!? Spent a good part of the day trying to get it off again.... NOTHING. Tried unbolting it from the throttle body thinking it might be in a bind with the tube. No movement. Beat on it, soaked it, heated it, nothing.
I'm thinking of cutting the orifice tube to get it off. Is this a possibility? Can the tube be re-coupled together with some kind of hose or something?

HELP! (please)

 

usually....by soaking it and letting I sit over night it'll pop loose. might have to add a little heat again in the AM too.

If you cut it then I fear that you're pretty well committed to replacing it as well. Unless you got some mad welding skills. Most likely those pipes are pretty thin from age and elements, and heat cycles.

 

No welding skills at all. I was hoping to maybe splice the tube back together with some heat resistant hose, if there is such a thing.