[ngnate]

I have a 94 Olds Cutless Supreme and all of a sudden it smells like gas inside and out. The fuel mileage has dropped to half of what it was. The exhaust gives off a thick cloud of unburned fuel. The cloud is blue or white, but the engine is using no water or oil. There are no gas leaks that I can see. Under the hood when the engine is warm and the engine is revved a visible gas vapor emits from the back of the engine. If I slow down for a stoplight but don't fully stop and press the accelerator it hestitates for 5-10 seconds before it starts to accelerate. I runs a little rough but not too bad. Does anyone have any good ideas for me other than purchasing a flame retardant suit and a fire extinguasher. Thank you for any help on my problem.