I have a 1995 Cadillac Fleetwood with only 87000 miles. I have owned for the last 50000 miles. My land yacht will not start. It cranks and catches occasionally but will not completely fire up. This problem began right after it sat for 3 weeks. When I started it, it ran but sputtered and then belched black smoke out both tailpipes before dieing.
I have replaced the fuel pressure regulator since it seemed to have been getting too much fuel. That did not help.
I am at a loss since the OBD shows no codes. Any ideas would be appreciated.