I had nothing better to do today so figured I would check out the throttle body and clean it as best I could (while on the car). With almost 17,000 miles on the car, the throttle body walls and butterfly were reasonably clean. However, I looked all the way down the bore to the base of the intake manifold and saw a bunch of black stuff coating the area. It is really too far to reach with a finger but I put a long screwdriver in to see what the stuff was and it is a thin layer of somewhat soft gunk. Short of removing the manifold to port/polish there does not seem to be any easy way to clean this up. I am not even sure it has that much of a detrimental effect. Anyone else notice this build-up?

Doug

 

its normal Doug, and the best and only way to easily clean it is with BG air induction system cleaner. I have a flush kit that you fill with the cleaner and it sprays a extremely fine mist at 90psi through a special wand you slip in between the air intake tube and the top of the throttle body and run the engine with this hooked up. It does a really good job at cleaning all this crud out

 

Sounds like a neat kit. Is it generally available for consumers or just for auto shops?

Doug

 

its probobly more out of $ that a DIY would want to spend. I didnt pay for it though either, was given to me by BG years ago. But heres the web site if youre interested
http://www.bgprod.com/products/fuelair.html

 

Thanks for the link, I never thought of pressure cleaning EGR pipes until I saw their kit. That could solve alot of problems for AJ16 engines, I think I'll put something together to try it.

I don't think I'd want to use the solvent cleaner on the molycoated AJ26 throttle bodies though.