Running RICH?

[IrishDrifter]

I have a 93 Nissan 240sx, with 90,000 miles on it. The car is in good shape and has had spark plugs, cap, rotor, plug wires all replaced 7 months ago. My car kinda bogs down for a split second when it starts and idles at 1000 rpm.You can smell all the gas not burning off and see a little cloud of black smoke comes out the tailpipe when i get on it and shift. And when it gets warm and i turn it off, it wont start. I checked the cap and rotor again and saw some white corrosion any tips please help.

[IrishDrifter]

Update: Okay now my car will not start at all... i checked the spark plugs and noticed that there was gass on the tip. Anyone has any troubleshooting tips that can save me a trip to get it diagnosed The car does still try to turn over and still is getting to much fuel

[theother1wstolen]

too much fuel on all cylinders or just one? if its just one its probably a leaky injector.

[IrishDrifter]

Nope not just one, all of them. I actually just tryed to start it and it tryed but made a kinda deep puh sound. Thats something it hasn't done before.