TB Cleaning

supercommuter · Post by **supercommuter** » Thu Mar 17, 2011 11:31 am

Is there a How-To on throttle body cleaning? I didn't see it in the How-To section. Thanks!

Post by **occasional demons** » Thu Mar 17, 2011 12:21 pm

It isn't too complicated.
Get some shop towels and cleaner such as Simple Green, or Castrol Super Clean. A can of non-chlorinated Brake cleaner.
Remove air filter box lid.
Slide red locks on the connectors, and disconnect the IAC and TPS connectors.
Move the throttle to WOT, and pull up some slack to remove the throttle cable.
Loosen the bellows clamp on both ends.
Remove the air filter.
Remove the vacuum line.
Remove the four screws holding the TB to the air filter box.
Pull the bellows tube and TB from the car.
Stuff a shop towel into the intake manifold to soak up the oil in there.
Remove the bellows tube from the TB.
Remove the IAC valve.
Spray your choice of cleaner into the TB Do not use the Brake cleaner! That is for the IAC valve.
Let it soak, and use a shop towel to wipe out the heavier accumulations.
While it is soaking spray any carbon/crud out of the IAC valve with the Brake cleaner. Let it dry.
Once the TB is cleaned of goo, rinse it out with water and dry.
Reassemble everything, and don't forget to take the towel out of the IM.
If you want to reduce the amount of oil in the IM, search for "catch can".

I haven't had an oem set up on my car for a long time, so this is all off the top of my balding head. If I forgot something, please chime in.

NickKo · Post by **NickKo** » Thu Mar 17, 2011 12:41 pm

Bill, you may want to BOLD this point:

"Do not use the carb cleaner! That is for the IAC valve. "

I would AVOID using the carb cleaner for the Inside of the throttle body bore.
It should be safe for the IAC valve, however.

- Nick

Danteneon · Post by **Danteneon** » Thu Mar 17, 2011 12:45 pm

I wouldn't use it on the IAC either. Stick with non-clorinated brake clean.

The warning that is on the TB says to only use Mopar blah blah blah cleaner so the coating on the TB plate doesn't get worn off...it is just non-clorinated brake cleaner.

supercommuter · Post by **supercommuter** » Thu Mar 17, 2011 1:08 pm

Thanks guys! So, carb cleaner on the IAC and TPS, and what in the TB exactly? Gimme something specific.

Johny · Post by **Johny** » Thu Mar 17, 2011 1:15 pm

Don't mean to hijack, but I'm also planning on doing this today. I used non-chlorinated break cleaner to clean the IAC and it worked wonders, would it be fine to use inside the TB?

Danteneon · Post by **Danteneon** » Thu Mar 17, 2011 1:30 pm

See my post above. Yes, it is safe.

The reason I don't recomend carb clean is because it isn't the safest thing to use on rubber. The non-clorniated brake clean is not as aggressive on rubber parts.

Johny · Post by **Johny** » Thu Mar 17, 2011 1:32 pm

Danteneon wrote:See my post above. Yes, it is safe.

Yeah I read it, just making sure. Thanks bro

NickKo · Post by **NickKo** » Thu Mar 17, 2011 2:04 pm

Danteneon wrote:See my post above. Yes, it is safe.

The reason I don't recomend carb clean is because it isn't the safest thing to use on rubber. The non-clorniated brake clean is not as aggressive on rubber parts.

Wouldn't carb cleaner, possibly damage the inside of the throttle body bore ??

- Nick

Danteneon · Post by **Danteneon** » Thu Mar 17, 2011 2:59 pm

It can attack the coating on the throttle blade. See my post above.

I must be slipping...that's two in a row

Post by **occasional demons** » Thu Mar 17, 2011 3:41 pm

Edited.....

supercommuter · Post by **supercommuter** » Wed Mar 23, 2011 4:20 pm

I cleaned my TB and IAC today, thanks guys!

Something I noticed, there is a pretty good size tear in that large ribbed rubber boot/hose that connects the TB to the intake manifold. It's about a 2" gash that runs horizontally across one of the ribs. Looks like it was worn through from rubbing on something.

I slopped a whole mess of clear RTV silicone over it, but I'm sure it got messed up when I was re-installing it, since it was on the bottom, plus I really don't expect that to do anything, just thought it might help a little.

Anyway, is it going to affect anything if I leave it like that for a little while? It's just air that passes through there, right? Does it have to be air-tight? Even with all that silicone I put over the gash, I'm sure it's not air-tight. If I should replace it, is there somewhere I can order it, or should I go to a junk yard and look for one.

Also I noticed the cap on the vacuum port nect to the IAC was all deteriorated and spilt, so I replaced that.

Danteneon · Post by **Danteneon** » Wed Mar 23, 2011 4:48 pm

Having the intake boot torn will allow un-filtered air to enter the engine. As far as making it run any different? No. It's still a good idea to replace it sooner than later. They pop up for sale on the site quite a bit, or like you said hit up a JY.

supercommuter · Post by **supercommuter** » Wed Mar 23, 2011 4:53 pm

Danteneon wrote:Having the intake boot torn will allow un-filtered air to enter the engine. As far as making it run any different? No. It's still a good idea to replace it sooner than later. They pop up for sale on the site quite a bit, or like you said hit up a JY.

Cool, thanks. I'll keep an eye out for a replacement.

Post by **occasional demons** » Wed Mar 23, 2011 5:42 pm

Danteneon wrote:Having the intake boot torn will allow un-filtered air to enter the engine. As far as making it run any different? No. It's still a good idea to replace it sooner than later. They pop up for sale on the site quite a bit, or like you said hit up a JY.

supercommuter wrote:in that large ribbed rubber boot/hose that connects the TB to the intake manifold.

If it is the one between the TB and IM, It could begin to randomly rev the engine at a very high speed. Basically it will create a huge vacuum leak, effectively bypassing the TB.

I would get a replacement sooner than later. If it should happen to act up in traffic, put it in neutral. That's what the rev limiter is for.

Just don't put it in gear while revving, if you have an ATX.

If it were me, I would wrap it in duct tape pretty well until you can get one.

4669783AC Throttle body duct $85.75

Um yeah, if you can get one from a JY, that is in good shape, I would look there, go to the dealer as a last resort.

And Dante, I know you liked that little slap.

Danteneon · Post by **Danteneon** » Wed Mar 23, 2011 5:46 pm

Ah crap. I deserved that

Sorry about the mis-information. For some odd reason I was thinking of a hose between the air filter and the TB. Don't ask me why

Post by **occasional demons** » Wed Mar 23, 2011 5:51 pm

Too many years with a CAI.

We both know it has nothing to do with old age creepage.

Danteneon · Post by **Danteneon** » Wed Mar 23, 2011 5:58 pm

Yep, exactly

I do find myself having to remember back when someone asks about certian stock questions. "Now what the hell did that look like again?"