Well, I decided to do a bit of cleaning on the throttle body and upper intake yesterday. I was able to clean out all of the carbon build up from the throttle body and i got some cleaned from the upper intake before I ran out of cleaner. I also decided to work on the throttle body. Its very small but the screws that hold the throttle plate to the throttle pin has those screws that stick out quite a bit. I got to thinking... I wonder how much that make the incoming air turbulant which would hinder high flow and compression of air. It may be next to nothing at all but i went ahead and shaved off the excess... heres the pics of after i finished the work and mod...
Everything taken off...
Upper intake needs a lot more work!
Throttle body after the screws have been shaven down...
My upper intake manifold is also plastic/ composite. But I also have a 4.0 OHV and its a 96. A friend of mine has a 93 or 94 with a 4.0 OHV as well, except his has a all metal intake manifold.
Okay, I had a pretty productive day with my upper and lower intake and throttle body after a failed junkyard run. Heres what my day was like...
First off I disconnected everything from my composite upper intake manifold and took it off the engine.
When I had that off I went ahead and soaked the crap out of it in throttle body cleaner. I bought 4 cans for all of this and the upper intake manifold too 2 1/2 cans worth. Heres some comparison of the before and after of the upper intake...
BEFORE
AFTER
And then I worked on cleaning the top end of the lower intake manifold.
BEFORE
AFTER
Then I went on to continue my plans with the throttle body. I wanted to trip off some of the pin in the throttle body to allow more air to flow with less restriction that would create turbulance. Sooo, I worked on it and ended up with this
This is the little piece that came out. May be little but it did make a difference in acceleration when speed is already up.
So, I had to clear codes and drive it a lot after I put everything back on because there was still a bit of cleaner in the lower intake. No big, it just caused a lot of misfiring and took 10 minutes of hard running to burn it all clean. Now with a cleaner intake manifold and the extra room for air to pass in the throttle body it is preforming a little better. Actually more than I thought since I figured I wouldnt feel a thing. Took me 4 hours from the start of taking it apart to firing it back up. Not bad for a days work.
Good on the engine to clean it like that! I do that for the upper and lower intakes and then the seafoam on the rest of then engine. Clean as a whistle!
Sunday was good, tailgate handle put on, oil changed, painted a ton of stuff as seen in the other threads, and cleaned the seats up with Tuff Stuff and used scotch gaurd on them. They look great now and nothings gonna be staining this truck! lol
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