I own a 91 Mazda Rx-7 Tubo coupe and I need a throttle body ( Mazda part #'s B370-13-650B Throttle Body and N370-13-645 Insulator). My current throttle is jammed open to full throttle. Mazda no longer makes the part and it doesn't appear to be available on the Mazda Dealer parts network. Any suggestion?

 

Never owned or woked on a FC, but can't you dismantle the TB and with the help of solvents, unfreeze the linkage? Even apply some torch heat with solvents.

 

hell yeah you free that sucker up. mine got stuck............on the highway, pulled over, got some tools took it off, cleaned it out, and it hasn't done it in over a year.