Nick
I hate to break the news, but it sounds like your car has a case of the Blown Headgasktes's. It is a common problem for these cars. Hence the reason the 93 + Supras have a metal headgasket. It can be fixed. email me for more info.
Thanks
ryan
rys88t@rysracing.com
sales@offroadtoys.com
sales@alarm4you.com