i have a 91 camaro 3.1 v6 and while i was driving down the freeway my rpms droped all the way down i lost throttle power but engine was still running then it shot back up to speed the rpms only droped for a few seconds then back to normal it did this for awhile until the car went dead. temp was fine oil seemed normal but when i looked underneath the car i saw the catalictic converter glowing bright red and engine did not want to start up again until it cooled down. then i just drove it home .any help would be appreciated thank you.