is there any way I can tell if a prier owner did the tb mod on my car? I just started reading about the mod and read how most people had to let their cars run for a minute or two before it would start idling. Well......Thats what my car does to and I was woundering why my car does this? Thanks. Ps I don't know if I would trust my mechanic skills enough to do this mod I was woundering if there is anyone who does this mod and sells it? THanks.

 

your thermowax and secondary throttle plate would be missing.

 

Look at the TB, (on a TII, you must remove the TMIC) and see if it has 3 sets of rotaters. The rotaters are connected to the throttle cable, so follow the throttle cable to see what I am talking about. When you find the rotaters, you will notice that there are either 3 rotaters per side of the TB (in a triangle shape, with one at the top, and two at the bottom), or just 2 rotaters. If there are only two, then the TB mod has been done!

I do not believe anyone on this forum is doing the TB mod, but I know BDC on teamfc3s.org is doing the mod (also included is some major porting and polishing of the TB) for $150 I believe. I had him do mine a few months ago, and it looks AWESOME!!! If you are really looking to get a better flow of air for your rex, do this mod. Especially, if you have a FMIC and a custom elbow adapter to the TB. The porting of the TB drastically reduces the turbulence of the intake air, making the IC elbow much less restrictive.

 

actually I do have a fmic so that would be great. I will check on my car tomorrow to see if I only see to rotaters. Thank you very much for the input!!!

 

the only way to really know is to take it a apart which would a little bit of a pain in the ***, it just makes the throttle more responsive and maybe a few hp

 

The TB mod does a few things:

Makes the car idle too low when cold.

Makes the throttle more responsive, but that can also cause the car to bog if throttle is stomped.

Removes a heat source from the intake (thermowax)

Removes a slight restriction from the throttle body

Allows the opportunity for porting / smoothing the TB

Can cause vacuum leak if done incorrectly

Removes a bunch of clutter from the outside of the TB

 

It's easy to tell from the outside. The thermowax may not have been removed, but the linkages for the #2 secondary throttles will be missing, and there'll be a plugged hole where the shaft was.

 

ok thanks man! just a stupid question but where would the plugged hole be? Thanks

 

^

 

This TB is on an NA.
The TII is kinda similar, but flipped left to right.
You can see the blue sealant in the shaft plug on this one.