Audi Parts Catalog Audi Accessories Catalog Audi Technical Articles VW-Audi Tech Forums
 
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Audi A4 Throttle Body Cleaning Replacement
 
Bookmark and Share

Pelican Technical Article:

Audi A4 Throttle Body Cleaning Replacement

Steve Vernon

Time:

1 hour1 hr

Tab:

$175

Talent:

**

Tools:

5mm Allen, flathead screwdriver

Applicable Models:

Audi A4 (2002-05)
Audi A4 Cabriolet (2003-06)

Parts Required:

New throttle body gasket

Hot Tip:

Remove the throttle body and let it soak in carburetor cleaner overnight

Performance Gain:

Smoother-running engine

Complementary Modification:

New fuel filter

The throttle body on the Audi A4 is a precision piece of equipment that is subject to a rather harsh environment. After years of reliable service, the throttle body may become dirty or clogged, which may result in lowered performance. A simple good cleaning may be all that is needed to restore performance and improve mileage. You may find that there is a lot of built-up dirt, particularly if a previous owner didn't change the air filter too often. Be sure to check your intake plenum boots for cracks while the throttle body is off and replace if necessary.

The throttle body is relatively easy to remove and clean. Before you begin work make sure that you have a new throttle body gasket. Even if you are just taking the throttle body off to clean you will need to install a new gasket when you put it all back together.

The throttle body (yellow arrow) is relatively easy to remove and clean.
Figure 1

The throttle body (yellow arrow) is relatively easy to remove and clean. It is located on the left side front of the engine connecting the rubber intake tube (red arrow) to the intake manifold (green arrow).

Begin by using a flathead screwdriver and removing the clamp holding the intake hose to the throttle body (yellow arrow).
Figure 2

Begin by using a flathead screwdriver and removing the clamp holding the intake hose to the throttle body (yellow arrow).

With the clamp off wiggle the hose off the throttle body and move it out of the way.
Figure 3

With the clamp off wiggle the hose off the throttle body and move it out of the way. This will give you access to the electrical connection below (red arrow).

Carefully release the clip and slide the wiring connection off of the throttle body (red arrow).
Figure 4

Carefully release the clip and slide the wiring connection off of the throttle body (red arrow).

There are four 5mm Allen bolts (red arrows, two shown) that hold the throttle body to the intake manifold.
Figure 5

There are four 5mm Allen bolts (red arrows, two shown) that hold the throttle body to the intake manifold. Use a 5mm Allen and remove the bolts and then the throttle body from the manifold.

Take your throttle body to a cleaning tube or some other suitable catch container.
Figure 6

Take your throttle body to a cleaning tube or some other suitable catch container. Use a good quality carb cleaner and Scotch Brite pad and give the interior of the body a good cleaning. Run lint-free cloths through all of the passages and make sure all the dirt and debris is removed. Note: this is the before cleaning picture.

The throttle body passes a high volume of air through it so the cleaner you can get it the better performance you will get.
Figure 7

The throttle body passes a high volume of air through it so the cleaner you can get it the better performance you will get. Note: here's the after cleaning picture. But you already knew that.

Make sure you remove the old gasket (yellow arrow) and clean the two mounting surface (red arrow) areas well.
Figure 8

Make sure you remove the old gasket (yellow arrow) and clean the two mounting surface (red arrow) areas well. Installation is the reverse of removal. Be sure to use a new throttle body gasket for the install.


Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Sat 12/3/2016 02:45:56 AM