Hey guys, I just picked up a 97 7.3 a few weeks ago. Up until yesterday the truck ran great. Good power, no issues, and it was running good. Yesterday, I got fuel, drove a few miles down the road with no issues and turned the truck off. Start it up about 15 minutes later, and it started up fine no issue. About a mile down the road the fuel filter light came on. About another mile down the road, the truck starts losing power and starts to "knock" (that's the best way I can describe it) and really bog. Pull off the side of the road and it dies. I get out, check the fuel filter, it looks good, put it back in, and it starts up but runs VERY rough and is almost impossible to keep running by itself. I eventually got it running about ten minutes later, and it ran like there was no issue for about 3 minutes down the road and then the same issue. I had to repeat this process about 5 times to get to my shop and diagnose it further.
Anyway, I changed the fuel filter, and on the ride home, it drove fine. No fuel filter light, no lack of power, nothing. This was about a 45 minute ride home, and I figured the filter was the root cause of the problem and called it "fixed". Well this morning, on my way to work, the truck did the same thing. Light came on, loss of power, truck dies. Same deal, about ten minutes later I get it running, am able to drive it about 2 miles and same thing again. Wait ten minutes, get it going, and I am able to get it home. Changed the CPS, just for shiggles, let it sit all day, and then I took it for a ride for about 10 minutes and no issue. I'm stumped. I did quite a bit of reading around the interwebz and I am coming up with a few possible solutions. I am planning on changing the fuel pump, and I was wondering if there is anything else I should look at.