My truck was having some problems while driving it. It wasn't an all the time problem, but here recently it has become quite the problem. I changed the air filter, due to it needing to be replaced, due to color and the possibility that it may be the problem. I did that and it made some change but didn't totally fix the problem. So the next thing I did was an oil change and a tune up which it was time for both anyway. The problem still existed but not to the extent that it once did. Well I drove my truck to work on this past Friday, and I made it to work no problem, to lunch no problem and then when I left, it was worse than any time other than before. It wouldn't go far, until it would sputter and cough worse than ever and then stall out. You could still start and drive the truck, but not for long, perhaps about 10-20 feet. So I had it towed to where I work, as I work for a dealership. I believe that the problem is a bad fuel filter, such as it is clogged and stalling the engine out. If you have any suggestions, please let me know. Thanks Charlotte