New to the V10.. Low fuel pressure

Jrork wrote:
HI everyone. We recently purchased a 2001 motorhome that's based on the F53 with a V10. I noticed that it seems to be hard to start and while it has a strong cranking action, it takes a bit to get it to fire.

I checked the fuel pressure and sure enough, with no fuel pressure showing it takes quite a bit of cranking before it even shows 10 lbs. A bit more and it gets to 20 lbs and starts. It stumbles for a second and then smooths out as the pressure gets up to a high of 28 lbs. Rev the motor a bit and it drops to about 24 lbs.

I swapped out the fuel filter and there was no change.

I disconnected the fuel pressure regulator and instead of the pressure climbing much, it only raised about 1 lbs.

I'm thinking I've narrowed it down to the fuel pump but wanted to double check first. Any thoughts or suggestions?

Thanks everyone.......John

After exploring all other avenues and once you decide to go for changing out the fuel pump, check out the floor above the tank, as many floor plans will allow you to cut through the floor and then install a marine type access cover. Sure saves a lot of work and especially if you ever need to get in there again, which could mean genset fuel delivery problems, as well.