I just took off my throttle body to clean it because of a slightly sticky gas pedal and i found all this nasty blow by oil... The PO neglected the truck pretty bad and when i bought it the throttle body would only open at 1,500 RPM because it was so gummed up.

This leads to the question, should i clean this?
I already cleaned the TB and IAC, should i just pull this and do it?
I dont want to just clean what i can reach for fear of knocking something down into the valves

Heres some pics to go off

 

Wow I have never seen one that bad!!!

I have heard that stuff like sea foam works great and other say it doesn`t I have never used it.

 

Ive used plenty of cans of seafoam through the pcv and it obviously hasnt done much, but i ended up taking off the top half of the intake tonight.

i CANNOT get that oil out of there, its baked on. 1 giant can of carb cleaner later and im only making minimal headway... this is gunna take a while.

Just ordered a PCV catch can to try and prevent this from happening again

 

When i cleaned my upper intake it took about six cans of carb cleaner and a lot of work to get it clean. Sometimes you need to spray a lot of carb cleaner into the intake and let it soak in for a few minutes, it will clean up, but it will take some time to get it done.

 

I got the rest of it off to peek at the valves, they look fine but the intake gets even dirtier further down. Im about to go hook up the pressurewasher and blast it out. Also a great time to change the fuel filter

 

let is soak in gas over night it will come clean

 

I just took my whole intake manifold off last weekend, I used this stuff called "Power Foam" http://www.amsoil.com/StoreFront/apf.aspx . Worked really well for me but I also had waaaay less gunk to deal with. The gas soak sounds like it work out well too.

 

valve areas will stay cleaner from more heat Burning off the build up. but wow, that is the worst I have ever seen, even in motors with really high mile blowby and a stuck open PCV valve.

 

OK now i need some help.

I got everything all clean, new gaskets and everything. Now im throwing the code Knock Sensor Bank 1
The truck idles really good but seem sluggish when i start driving.

I also changed the fuel filter if that could do anything.

HELP!

 

This is why I don't use Seafoam.

Imagine that kind of crap going down into your engine and catalytic converter!

 

Could sludge in the intake make an engine (3.4 v6) have a HIGH RPM missfire? I have done every single thing a mind could imagine and I'm now grasping for straws. I'm down to either bad ECU (ECM) or badly clogged injectors. But then I opened the intacke up and removed it and found sludge/enigne oil in it... Wondering what would cause it or if it also may be the cause of the High RPM miss?