Took my TPS off today, so that means yankin the TB off.

I take it off (first time doing so) and look at the rear end... and it has a bar going across the primary chambers... except there are no plates in it. Is this how its supposed to be?

I'm attaching a video clip.
Its in Divx 5.02 and 850KB

I couldnt take any pics because my camera is a POS and doesnt focus within 3 ft.

http://www.aztechrotary.com/files/jon/tb.avi

 

yep.

lots of people remove them. but normaly you take the bar out as well.

 

What is the purpose of it? And since the bar is out... can I take that diaphram thingy off and plug the vac line that goes to it as well?

 

No it doesn’t...
That's a partly completed throttle body mod. It is not a good idea to remove the plates and leave the shaft and linkages behind. The shaft is held in place by the plates, and without them it can move sideways and jam the throttle. I highly recommend you remove the shaft and linkages as per the instructions in the link (you don't need to remove the thermowax though).

 

Thats what people do when they do the throttle body mod. Looks like someone half-assed it. Your supposed to take the bar out, plug the holes with something so the engine isn't pulling in unmetered air, and take off the vacuum diaphram. The diaphram is for when you let you foot off the gas. It slowly closes the throttle plates instead of letting them slam shut. People do this mod cause it give a more crisp feeling throttle response.

 

Ok, I took the bar out, and the linkage to the diaphram. So its ok to just leave the diaphram there? Should I plug it up or connect the hose as normal?

I thought the "Throttle body mod" was just taking a dremel to the edges of the TB to make a crisper "impact zone"

And NZConvert... I couldn't see how in the hell I could have reached that phillips screw without taking the TB off. Plus I wanted to do it anyways to learn. No harm done

I'm glad I found out about the bar though.. its now off

It did have ALOT of side to side play....

 

Ah ****.

Just read the FC3S Pro site.. I really don't want to do all that ****. **** **** ****.

So by taking that bar out.. I'm letting in un-metered air. Great.

I don't have any taps or anything either.

Looks like its going back in for a few days. This car is daily driven.. and hasn't fuckedup yet. (now that I have jynxed it)

 

Take the damper off, remove the vac lines and plug the nipple on the UIM where it connected.
No, that's commonly referred to as "porting" the TB (even though it actually isn't being ported). Removing the upstream secondary throttles allows you to do that reshaping of the TB, which makes a big difference to flow.
In your case it's probably just as well. A jammed open throttle is a scary experience I can assure you... And that's what stubby screwdrivers are for.
It not that hrad really. The thermowax and linkages on the firewall side can be left untouched (and tus the hole on that side will remain airtight), and a mechanic would probably tap and plug the other hole for you for a small fee.
If you don't plug the hole, you are.

 

I found some bolts with a flanged head that sat in the hole perfectly. (They are all over the car and I had some extra ones after doing a some mods) I JB welded them in place. I heard tell of them popping out under boost, but my car is N/A and I haven't had any problems.

 

Awesome. My car is n/a as well so it shouldn't be a problem.

Thanks a million guys, ya never let me down!

 

It took a long time for the JB weld to harden to where I could handle the TB without the bolts falling out. I couldn't put the bolts in sideways and try to seal them in, I had to sit the TB on its side on a table and have the bolts pointing straight down and let the JB weld cure like that, then do the other side.