No, Only air go's through the throttle body on a multi port injection engine. it would help on the older throttle body injected engines, but they don't get the build up of dirt because the fuel flowing pass the throttle body keeps it clean.

 

A throttle body has to get pretty severely crusted up before it has any influence on performance. A little shot of Gumout every now and then will keep it shiny, if shiny matters.

 

For what it is worth, I looked at mine at 20,000 miles, when I was swapping out the intake charge tubes, the plate was shiny, and the bore just had a hint of discoloration in one very small area.

 

I guess the dealer was just looking for some extra $$$$

 

Hey look at how clean the tail pipe looks mine looks as though its new 09 5000 miles

 

The contamination which deposits on the Throttle Body (TB) is usually the cause of stalling or high idle rpm or sticking throttle. The deposits will usually get between the body and the blade or on the Idle Air Control passages and will block the idle air flow. The computers job is to keep the engine on and will try "limp home mode" to get you home or the garage.

The deposits are caused by engine oil vapors, fuel vapors, water vapor condensing inside the TB when you shut off the engine and the engine cools down. One of the reasons engine oil has to be drained and refilled is becaude this oil contamination always occurs in an OTTO cycle engine. Try it: pull your oil dipstick and smell it for gasoline vapors. Do you need an oil chage?

Most manufacturers do not recommend TB service since they do not want to be responsible for run-away engines. (can you say T*y*t*). They recommend replacement of the TB and idle air components if they don't function as designed.

If you are going to service the TB, do not use chlorinated solvents (brake, carb, choke). All chemical manufacturers now sell specific TB assembly cleaners.

With the engine off remove the air induction to gain access to the TB. Open the throttle manually (wireless throttle? try a small stick) and spray the solvent into the air passage inside the TB for max 2-3 seconds. Stop and you will see the solvent pour out of the TB totally black. Repeat 5-6 times. Do not empty the can into the engine because you will flood the motor.

After reassembling the induction, you will have to start the engine by going into "clear flood mode". You may have to try this 3-5 times until the TB cleaner clears the engine. Run the engine until Normal Operating Temperature (NOP) is acheived.

If you did not fix it, take it to a real mechanic, not Quicky Sell Auto Shop.

daveproghhr, ASE CMAT

 

I will never understand this mentality (Millennial, I think) that causes people to throw out all official and confirmed data in favor of their "gut feeling" that they know better.

"So, I read all this advice that tells me not to screw with the thing, but I think I will screw with it anyway."
"Oops, I broke it. What should I do now?"

 

Call GM or at least blame them for making the throttle body so fragile.
we can only tell people of our experience with these things, like, Don’t try to gap the Iridium spark plugs

 

??? Trying to figure out why you folks are answering to a 10 year old thread........

 

Broke the throttle body on a 10+ year old car by doing something people told me not to...

There should be a recall.