2002 ford 450 losses power and starts smoking while driving i have replaced the fuel pump and fuel filter also have checked the connections with the valve cover gaskets still no change please help

 

What color is the smoke?

Some more information like miles and such would help us out.

 

Like James said... Internet diagnostics is difficult, but without any background info its damn near impossible...

Need to know the miles on the truck, any mods to the truck, color and smell to the smoke...

Hard to say what it could be, my wide open guess is its turbo related...

 

finally got it fixed the lining of the inside of the fuel tank came apart and stopped up all the filters took it off sent it out for repairs and now runs like a champ but thanks for your replies jeff

 

Weird... There is no lining on our tanks, there plastic...