super filthy intake mani

elgineddie · June 17, 2004

Hey guys,

I have a 2001 K2500 6.0L with about 84,000. I pulled off the throttle body to clean and inspect things and I couldn't believe the amount of sticky oil crud that was inside the rear part of the TB and inside the intake manifold! I mean it is bad! My fingers are still stained. I cleaned as much as I could but how can I get into the back-most part of the mani? Should I spray TB cleaner and scrub it out with a long, skinny brush? Should I replace the TB, start it and shoot tons of cleaner down it's throat while running?

On a related note, I can't image where this sticky oil crud comes from. It's gotta have somthing to do with the oil from the K&N.

Thanks in advance for any help!

Shaners · June 17, 2004

It's normal build-up. I know mine is in need of cleaning because the throttle sticks a little when I push on it.

Throttle Body cleaner will do the trick along with a brush and some clean lint free rags.

There is also a product called Sea Foam that is sopposed to clean the TB out for you with no scrubbing. You just spray it in while the engine is running.

elgineddie · June 17, 2004

Thanks Shaners,

I just got back from Napa with a full on bag o' goodies including SeaFoam and some Chevron Techroline. I quickly gave SeaFoam a shot and it cleans something awesome!

Thanks again,

Ed

AZ-Z71 · June 21, 2004

Question about Sea Foam.

I know that if you run the engine with the air intake removed the truck idles real bad and then you end up throwing a code for the MAF. Happened to me once when I had the intake off and had to move the truck forward a few inches. Could barely even start the truck.

So how do you use the Sea Foam? Spray into the throttle body while engine off then re-atttach the air intake then start the truck.

I think I read a post on here where someone was using it through a vacuum hose? What gets cleaned if you do that? Does it clean the throttle body?

elgineddie · June 21, 2004

AZ-Z71,

I'll try to answer this one. Kinda long, sorry!

I read somewhere on this 'board that you should disconnect the MAF and then remove the intake horn/tube/K&N body or whatever you have attached to the throttle body.

I did this and the truck ran fine without anything attached... something that used to never happen if that MAF was still connected! It still throws a MAF code but your basic code reader can clear that.

I bought the spray form of the Sea Foam. I think it's called Sea Foam Deep Creep. I pulled off the intake, unhooked the MAF, started the truck and sprayed the heck out of the intake straight down the throat. Loaded it up something good, shut it off and let it sit for a few minutes. I restarted and repeated the process. I think it cleaned it nicely. I also removed the throttle body from the manifold to clean the inside of the butterfly because it was like tar, so I was also able to clean the inside of the manifold directly while it was disassembled.

When I was at the parts store, I also picked up a can of the old school, liquid Sea Foam. Reading the label said I could hook it directly to a vaccuum hose (like you initially asked) but I can't figure that one out to save my life! After all the cleaning I did the truck still idles like sheeeeot.

Ed

AZ-Z71 · June 21, 2004

Hmmmmm, have you changed plugs or wires to see if it will idle better. There is also the IAC (I think that is the correct order of the letters) that part is expensive, like a hundred bucks for that little sensor. I can't remember if it can be cleaned. I know it has a pintel and maybe during cleaning you bumped it. I have the directions at home as to how far out the pintel needs to be and what the relearn procedure is. If you think that may help to re-adjust the IAC then I'll dig up the instructions.