Throttle Body Cleaning - 2001 4runner - **PICTURES**

[ramonortiz55]

Last weekend I decided to clean the throttle body on my 4runner.

Decided to document the procedure In hopes it would benefit someone who likes do things on their own:

For this task, I picked up some throttle body cleaner, a rag, and my wife's toothbrush:



One of the most important steps in this procedure is to stare down the throttle for a good 2 or 3 minutes. This helps break down the carbon inside. The harder you stare, the more it breaks down and easier it is to clean. Sorta like WD-40 loosens up rusted nuts and bolts.



First step is removing the airbox assembly, loosen airbox bolts and straps:





unplug mass airflow sensor and any other connectors in the vicinity:



There will be a smaller airbox towards the firewall with some airlines connecting into it, remove the airhoses and the small airbox:





Don't forget the airhoses that run towards the front of the engine towards the piping of the airbox:





Loosening these thinner clamps will help removing the piping to the airbox:







Remove another plug, this one is right besides the accelerator cable:



Three cooling lines will be feeding into the throttle body, these can be removed also:







Another plug:



Remove the accelerator cable off the throttle, this can be done by clocking the body of the spring and sliding it out carefully:

 

[ramonortiz55]

Another picture of everything removed:



Remove the two top nuts that are holding the throttle in position:



Now remove the bottom bolts that are holding the throttle in position:



Pull off the throttle gently:



Take it to the operating table:



Generously spray inside the throttle body with cleaner and brush the carbon off with your wife's toothbrush and rag:



Carefully rotate the "door" to make sure all the carbon buildup has been cleaned out.

If you aren't bleeding, you aren't done:



Once you are satisfied with the removal of carbon, installation is reverse of removal.

 

[limitedvan8]

love the added comedy in your write ups :banana:

 

[baja1]

wait till you see what she does with YOUR toothbrush! :toilet3:

 

[Chopper678]

The operating table i think we have the same model
Thanks for the write up!

 

[jgue467]

Good job documenting.

Me is lazy and only remove the large air hose going into the plenum and clean what I can from there - works great.