Set timing mode
 

I bought a 91 Cadillac eldorado with 68,000 miles on it. I am having a couple of problems with it and am wanting some advice or direction on what I should do to fix it.
There are some issues with it staying running once you start it up... It turns over will idle high (1500-2500 RPM's) and some times sputter and then turns off. Other times it will start, idle high for a while and then it will drive fine. then I get the message, "Set Timing Mode". then the car will die out completly. Usually when going to restart the car it will idle hard, and high, say set timing mode and that the engine is hot, and I've noticed the accelerator pedal kind of bounces a little bit when it dies.

I pulled the codes...EO14,EO16,EO22,EO65,EO71,EO97
B120, B121, B122, B333, B334, B335, B336, B337, B450, B552

I love this car and any help would be appreciated.