Professional Products throttle body IAC TPS installation

I was installing my Professional Products 70mm throttle body and found two problems.

First, the IAC gaskets they supply have the air transfer holes offset, and the t/b's holes are parallel like the stock one. Not a problem that can't be solve with a sheet of gasket maker so I'm not really stressing that.

The second problem is that the TPS adjuster ring built into the new t/b moves the tps out far enough to cause the IAC to contact the tps before it even contacts the t/b mating surface. Double checked everything, but to no go.

After searching I found that there are at least two part numbers for the TPS for our years. Anyone know if they are that physically different that one would work and not the other? Even the Pro Products tech guy seemed perplexed and said he never heard of that. Curently waiting for the "engineer" to call me back.

On Saturday, if they can't help me, I'm going to my friends machine shop and make an aluminum spacer to deal with this.

Anybody with a Professional Products 70mm t/b experience this.

Thanks and best regards to all.

Yes. I used the original tps. Unfortunately, I live on an island, and part stores here leave alot to be desired ( meaning, they don't have tps's laying around for older cars.). This sounds crazy, but I was thinking that the 86-93 tps's look a little thinner than the 94-95's. Anyone know if the bolt patters are the same between models. Maybe I could just get a 86-93 and use that instead. I have no problem soldering and heat shrink tubing the wires to adapt to my plug. Spent a little more than I wanted on this phase because of order mistakes and such so I'm trying to avoid buying tps's and having the same problem. Didn't have to do anything to my mounting holes. The elbow to intake and t/b to elbow bolt patterns were ok actually. Guess I was lucky in that respect.
It was weird. The parts list included with the t/b show an aluminum spacer and longer bolts. Those were obviously not included. But the Pro Products website has a newer parts list that does not show those things. I was thinking that maybe there was a modification made during the casting process that negated the need for the spacer, but unfortunately I got one of the t/b's that needed a spacer but was not sent with one. Knowing my luck, that's probably what happened.
If the "engineer" (sorry engineer)can't help me, I'll just make a 1/2 inch aluminum spacer using the correct gasket as a template. Oh well, another "economy" based decision bites in a$$.
Tech lines leave alot to be desired these days.
Thanks guys!

Hopefully the picture of the 1/2 inch spacer I made will show.
All's well now in paradise. Hopefully helps anyone else who may encounter this. Probably no one else will have this problem as I am cursed at times. It's funny, my spacer is exactly the same thickness as the tps adjuster spacer. Hmmm

hollywoodstang said:

that's just weird...

I had the same 70mm throttle body and never had to do anything like that...

Click to expand...

No kidding. I double checked everything, but that's what I had to do to make it work. Like I said earlier, the parts list included with my kit listed a spacer and screws. Maybe I got a very early casting that neede one? Anyway, who cares now as problem solved!!