I don't suppose anyone knows what manner GM set up the two return springs on a TPI throttle body.
I rebuilt mine with bushings and all that is fine but the damn springs sprung taking it apart before I could
tell how they were oriented.

I'm not sure what their logic was with two of them unless it's just one as a backup, they both attach to
the inner and outer plastic holders in the same at rest position more or less so I tried giving the inner one
a single turn and the outer none, giving them both a single turn, and it does not seem possible to give the outer
a turn and the inner one not. The first option I read on a post from long ago from a fellow but that seems to leave
the outer spring doing basically nothing, and my pre-disassembly photos show the coils on the outer bound
together more than that position leaves it so I don't think that's right. At any rate everything I've tried feels either too soft or too stiff.
This is a MT car so having it too stiff is annoying for feathering the throttle when moving off from
a standstill and too soft is a bad idea in general.

​​​​​​​Anybody?

 

Don't know the answer to your question about the springs.

Is your car a 1988 and down or a 1989 and up car?

The throttle body linkage & throttle cable, and some other things changed from 1988 to 1989. 89+ have a smooth progressive acting cam style throttle linkage where the 88 down cars don't.

 

Good point, it's an 86 L98. Sorry about that.

 

Is you car a F-body (Camaro/Firebird) or a Y-body (Vette)?

There weren't any F-body 85/86 TPI 5 speeds or any year L98 5 speeds and the L98 wasn't available until 1987 in the F-body.

You don't have your member profile filled in so we have no idea.

 

Sorry again, 86 Corvette