Smokes and smells like gas at muffler

SOURCE: gas smell and smoke

I don't see how trans fluid answers this question because i would first be wondering where th fuel smell and smoke are coming from... i had a leaking fuel rail on my truck and replace it along with the injectors and had better mpg and no fuel smell or smoke... maybe this helps better than just say trans fluid....

SOURCE: Engine Smoke

last month is not that long ago I would take it back the the guys who did the water pump and have them look at it it could be as simple as a loose hose clamp or a hose that has fatigue and is starting to leak.

Hope this helps you out.

mike

SOURCE: truck starts, but has a hard time staying running.

I wouldn't say that the carburator is bad, but it may have some defective components in it, like a sticking float or leaking gasket. Can you see any fuel leaking in or around the carb? You can purchase a carburator rebuild kit at most autoparts stores. You must have the right number for the carb. There is usually a metal tag attached under one of the bolts that hold the carb to the throttle body that will have the number on it and sometimes it is stamped on the carburator body. Before you dig into the carburator, however, check for more mundane causes, like a faulty or fouled spark plug. Hope this helped and best wishes.

SOURCE: blows lots of black smoke if back fire knocking smell of fuel in

are you losing coolant? ford had a huge problem with that engine,and the coolant eats the main bearings.
the defect is in the EGR valve setup.
check with ford,they are aware of the issue,there are thousands of them

SOURCE: running really rough and smells like unburned gas

Time for a different car!