1G vacuum ports problem/question 1990 gsx

[Adrian97]

Hello! I'm new here (sorry for my Bad English)
Okay i have a question, I will put my N/T Throttle Body from my 92 eclipse GS to my 1990 GSX what do u think guys ? will it work?
i have adapters so i can connect new ISC and TPS senaor easily
But i saw that N/T 92 TB have only 3 vacuum ports and my Tutbo TB from 1990 have 4 vacuum ports. Do I have to connect them?
What should I do with the 4th port?
I saw that many people have taped these ports like this https://imageshack.us/i/pmbot1Phj
Can i do the same with my new 3 ports TB?
This is my 1990 gsx TB
https://imageshack.us/i/pnvhdCRdj
and i will put this one with new ISC and TPS from 2G with IPS in
https://imageshack.us/i/potNMkf1j

 

[streetraceboi]

If im not mistaken. You would have to install non 90 TPS sensor since that does differ between the two.

 

[Adrian97]

No, I have installed TB from my 92 gs and I bought it https://www.ebay.com/itm/1G-4g63-DS...r-for-2G-TPS-throttle-body-swap-/262421089450 and plugged TPS with this.
But problem is that i have only 3 vaccum ports in that " New " TB and my old TB had 4 vaccum ports and i dont know how should I connect it to work well.
can I leave these hoses and just plugged ports on TB or i need to connect it ? all of them ?