Friday night in the garage: Throttle body cleaning
 

Over the past few weeks, I have been getting a little random stumble at idle even after resetting the ECU (by disconnecting the neg battery cable for a few minutes); replacing coolant temp sensor; running Techron in a few tanks of gas; changing brands of gas; changing spark plugs (what else can I throw at this?).

So I finally had DanoTT talk to our tech at the dealership who suggested since my car has somewhat high miles (75K), I might pull the throttle body and see what it looks like, it might need cleaning. It takes some special cleaner (of course) that cost $4.77 (whew!) from the Audi parts department.

Well, here are the pictures, I'm thinking it needs a little cleaning! Dan is bringing over the cleaner - I'll post "after" pictures when I'm done.

Intake hose disconnected, throttle body still on car:
<img src="http://images15.fotki.com/v266/photos/4/41970/1982850/throttlebody002-vi.jpg">

Throttle body removed from car - look at all that gunk!
<img src="http://images15.fotki.com/v263/photos/4/41970/1982850/throttlebody010-vi.jpg">

Ick!

Time to flush the system with drano, right?

? will a momentary disconnect of the bat'ry NOT clear the ecu maps?

Sand.....I couldn't find the link to the infamous post

Did you say Dano?.......LoL....>>
 

Have fun tonight!

hmm... i'm about at the same mileage - should check mine. hope you got a new gasket too!

that looks almost as bad as mine on the eurovan.

After pics - nice and clean now!
 

And a short test drive was good - I'll report back if the stumble at idle continues (again, it's very random, but drives me crazy).

<img src="http://images15.fotki.com/v266/photos/4/41970/1982850/throttlebody025-vi.jpg">

<img src="http://images15.fotki.com/v267/photos/4/41970/1982850/throttlebody024-vi.jpg">

Here's the stuff used to clean it - according to Dan, there is some type of plastic micro coating (?) on the throttle plate that regular carb cleaner can damage. So use this stuff:
<img src="http://images15.fotki.com/v263/photos/4/41970/1982850/throttlebody027-vi.jpg">

Much better...>>!
 

But now you guys need a cleaning...:-)