Hello friends, i have 2008 vette, would like to know is it possible to clean/wash the throttle and set again on factory position? What are the basic tips for wash/clean? How to get on factory posistion after wash, and what can cause so dirty throttle, how can i feel it on car?idles?thanks a lot

 

I have pulled and wiped out my TB several times without ever needing to do a relearn. Here it is:

Throttle Learn
Description
The engine control module (ECM) learns the idle position of the throttle plate to ensure the correct idle. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position. The idle may be unstable or a DTC may set if the throttle position is not learned.

Conditions for Running the Throttle Learn Procedure
• DTCs P0101, P0102, P0103, P0107, P0108, P0111, P0112, P0113, P0506, and P0507 are not set.

• The engine speed is between 450-4,000 RPM.

• The manifold absolute pressure (MAP) is greater than 5 kPa.

• The mass air flow (MAF) is greater than 2 g/s.

• The ignition 1 voltage is greater than 10 volts.

Throttle Learn
Important: Do NOT perform this procedure if DTCs are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

Start and idle the engine in PARK for 3 minutes.
With a scan tool, monitor desired and actual RPM.
The ECM will start to learn the new idle cells and Desired RPM should start to decrease.
Ignition OFF for 60 seconds.
Start and idle the engine in PARK for 3 minutes.
After the 3 minute run time the engine should be idling normal.
Important: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn.

⇒ If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations and extended idles.

After the drive cycle, the engine should be idling normally.
⇒ If the engine idle speed has not been learned, turn OFF the ignition for 60 seconds and repeat step 6.

Once the engine speed has returned to normal, clear DTCs.

 

I've also taken my TB off and cleaned it up without any problems.

A TB that dirty must've been going through some awful dusty roads with a filthy air cleaner on.
Or maybe it had an over-oiled K&N filter and the oil stuck to the TB and caused dust to stick.

 

Somehow there is a leak & unfiltered air is entering the air intake as that TB is filthy. Find & fix that problem before you clean up or it will just get dirty again.

Update your findings, the fix & how it runs once you get it corrected.

GD