I have searched the forum but was wondering if there is a write up with pics on how to do a throttle body cleaning.

I got a Throttle Body Malfunction code, rough idle, horrible acceleration, jumping RPM, flashing CEL, misfire on #4.

Tried to start car this morning and wouldn't even start.

1997 Audi A4 1.8 143,000miles

Already tried TBA, next was cleaning before forking over $500 for new throttle body and installation.

 

Did you try the TBA using VAG-COM or by using the key in ignition? As VAG-COM is the only way really as all engine fault codes must be cleared before doing the throttle body alignment.

 

This doesn't just seem to be a dirty throttle body.. But okay.
Take the hose from air inlet off, clean the hose..
Spray some strong solvant inside the throttle body (not too much though), and wipe off with a lint-free(!!) cloth. I'd recommend a toothbrush to clean deeper inside there.
There is special tools for cleaning the throttle body, which look like flexible jointed toothbrushes.. Kinda hard without them.

 

Do you have to do an adjustment on the TB for the 97? I was told we didn't have to on our years. Or maybe just the 2.8?
See if you can get a used TB would be a lot less.

 

Wouldn't hurt to do the TBA.

As for cleaning your current TBA, it's quite simple. I'd recommend taking off the entire Throttle body so you can clean it from both ends of it. It's 4 allen bolts that attach it to the intake manifold. Take those off then also the throttle cable and also unbolt the support for the plastic squishy thing below the Throttle Body.

Once you have it off, spray it with some carb cleaner, brake cleaner, etc. Use an old toothbrush to brush off the black gunk right in the center. Do the same for both sides until the TB is clean and then reassemble. Then do the TBA by leaving the ignition on (but don't start the engine) for about 5 minutes. Just go out take a bathroom break or something. Come back and then start your car and see if it starts.

But I do agree, sounds like if your car can't start, it may be more than just your TB that is giving you problems. I'd suggest taking a look at your spark plugs first since you are having misfires and rough idle.

 

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