90 Throttlebody

[unclesam099]

This will fit on my '92 without mods, right? They look different just looking at it, but it looks like it'd work.

Will all of the sensors work, too? Thanks.

 

[femmeDSM]

It should be okay. The problem with this usually lies in attempting the reverse of what you're wanting to do (i.e. swapping a 91+ TB into a '90). The differences in TBs are as follows, if memory serves:

ISC is in a different location (on the front/bottom of the 90)
TPS on the 90 is smaller
Your 91+ will have a different fuel rail. The 91 TBs hit our 90 fuel rails, which is why they won't work on the 1990s without modification.

The overall size is the same. It should bolt right on. If you're eliminating the vac lines, you will have even less to worry about (since the 90 TB has two vac ports on top, and two on the side, vs your 4 on top)

 

[unclesam099]

Cool, I searched for an answer but couldn't find one. The side 2 ports are already looped so I will just do the top and be ready to go!

 

[ian7321]

I thought that a 90 TB had a different ISC or TPS and that you have to switch the 91+ over?

 

[femmeDSM]

I thought that a 90 TB had a different ISC or TPS and that you have to switch the 91+ over?

Correct, the ISC and TPS are both different. But as far as swaps go, the differences are in the 91+ car's favor. Us 90 owners are SOL when swapping throttle bodies. But the 90 will work on a 91+, presumably without modification, provided the correct year sensors are used.

A quick search turned up a few posts where others had successfully accomplished the swap. I can dig them up if you'd like to contact the poster to go over any details I may have missed.


Edit: Here's one post I managed to find. Might want to talk to the few members who mentioned accomplishing the swap: http://www.dsmtuners.com/forums/showthread.php?t=144252&highlight=90+throttle+body+swap