TPS / TB Swapping Question

[Bosco]

I have been searching through TPS / Idle switch threads, and have a couple questions:

Are the Turbo and N/A TPS any different? I think NO.
Are the Turbo and N/A throttle body any different? I also Think NO.

Is there a good reason to want to swap the whole TB instead of just the TPS? I heard some mention of it, but no real explanation.

I'm wanting to try out my TPS off of a spare N/A engine I have on to my SS...If that sounds feasable...

[vrg3]

Yes, turbo and N/A are the same.

The throttle body changed a little at some point around 91 or 92 -- early ones had an adjustable needle valve for controlling air bypass around the throttle plate, but later ones didn't. They may have just covered up the adjusting screw. In any case, you were never meant to adjust the valve anyway.

The reason to swap throttle bodies instead of just TPSes is that it can be a pain to calibrate the idle switch in the TPS; it can be easier to just swap in the entire throttle body.

Be sure to use a new throttle body gasket if you do that, though.

[THAWA]

new gasket you say? If one was to use the same gasket whenb replacing a throttlebpody do you think that could cause idle problems?

[vrg3]

Yes, it could, because it could cause a vacuum leak.

A new gasket is part number 16175AA150 and costs like two bucks from the dealer. If you're stuck or cheap, though, you should be able to cut your own out from some gasket material using the old one as a guide.