i installed my p2r tb spacer today and i notice a lot of blac gummy build up inside the throttle body and intake plenum. how much does it affect performance and how do i clean it up?

 

take it off and use carb cleaner

 

what he said !!! i noticed the same thing on mine

 

Which side of the throttle plate? At 77,000 miles mine is perfectly clean on the airfilter side and slightly dirty on the backside due to EGR and PCV. This is one reason I only run a factory paper air filter.

Unless it's extraordinarily dirty, you won't feel a performance increase.

 

Most throttle plates accumulate an amazing amount of oil and soot on the inside. If you have long fingers or are handy and can make a tool, you can use a towel soaked in carb cleaner (don't drip on the paint!) to wipe off the gunk. Probably by about 50k you need to actually unbolt the throttle body and clean it thoroughly with carb cleaner. When I've done that on my previous cars they go from kind of a ragged idle and touchy low rpm throttle response to more like a new car, very smooth. The problem is that at low idle the throttle isn't open very far so a little blockage or dirt can really create erratic air flow, turbulence, etc... and the rpm will wobble. I have just done the manual cleaning on my TL and it helped, but sometime soon I need to take it off and clean it well. I don't know if it has an idle air bypass valve, but often there are a couple of secondary orifices (like EGR) that can almost get completely plugged and if you clean them out it will make a huge difference, not in power or mpg, but just in throttle smoothness.

 

You might try spraying some Seafoam Deepcreep in there to clean it up.

 

Pulling the TB off is the only correct way of doing this. Think about where all of the crud goes once it's freed up.

 

^^^ That's true. How about someone writing up a good DIY on how to remove, clean and install the throttle body???

 

Jack ur car up from front passenger side...take ur cai or stock airbox off ur TB and put a towel right under the opening of your TB and spray it with TB cleaner and let it chill for 6 to 10 sec and u'll see it running down.....keep doing that for couple time and start to wipe it down on the inside of your TB....that's how i did it on my car.

 

But how did you get to the back side of the blade?

 

turn the key once in it gowns down

 

IDK about that LOL.

 

As a side note -

The service manual states this warning, numerous times. And, the service manual is not in the habit on saying nonsense warnings either.

Just thought you should know.

 

When I cleaned mine, I unhooked the rubber gasket between the TB and intake, and removed the bolts that secure the TB and completely douse both sides with cleaner. Let it run out, and dry, then reinstall. Not really difficult if you know how to undo bolts and tighten them down again