i have a 89 civic hb si, i need to replace a tps sensor.. its riveted on.. and i dont want to replace the whole throttle body, so what do i do? and where can i get a tps sensor sold separately from the throttle body? - 89 civic hc si 1.6L

 

You should be able to get a TPS seperate from the TB, hondaautomotiveparts.com would be a good place to look.

If it's riveted on, you should be able to drill out the old rivet, and potentially use a lock nut and bolt to hold the new one in place. Otherwise, if it's only sold as one piece(at least oem), you should find out by searching the above site.