Cadillac Deville Smell

Engine Is Running Too Rich, Producing Exhaust Smell Of Gas,black Stain When Holding Hand On Tailpipe. What Is The Likely Repair Needed?

If Fed Slowly Will Get Up To About 44 Mph And Then Stall And Die. Car Will Now Run Good Till It Hits 40 Mph If You Give It A Slow Steady...

I Have A 67 Cadillac That Has Strong Exhaust-type Odors When Parked In The Garage. The Exhaust From The Car When Running Is Very Heavy (but...