Hello, I have a 99 7.3 runs good on flats but as soon as you start climbing a hill it will slowly lose power start missing and die sounds like it out of fuel I let it idle for a while and it will smooth out but problem come back. should I look at the fuel pump or the high pressure oil pump? please help!!!

 

There is a great section here for diesel problems. If you scroll down from here a bit you will come to the Diesel Section with pages for the various diesel engines. You should post your problem there and I am sure you will get help. Good luck.

 

Thanks for the reply but I am having a hard time finding diesel stuff

 

When you are on the main list of forums here just scroll on down and you will come to it. Or if you are on this page look at the top of the page and you will see a line of buttons right along the top of the page. The second one in is "Forums", just move your cursor over that and click on "List". That gets you to the main page and just scroll down until you come to the Diesel Section where you will see the 7.3 powerstroke page and just click on it and post your question. You will soon find your way around.

 

Here's where your question belongs:

https://www.ford-trucks.com/forums/forum31/

The 7.3 people are some of the best around. I know. That's my FTE area.

 

Sounds like you've got a fuel restriction that is causing a problem under load. If you get on a flat piece of road and hold it at WOT (wide open throttle = floor it) do you have the same problem?

The proper way to test this is with a fuel pressure gauge. There is a port on the back of the fuel filter housing you can use for the gauge. You need to monitor pressure while driving so you can see if it falls off.

A common cause of this is the screens in the mixing chamber getting partially plugged or dirty.

Clean screens


Dirty screens


If you end up having to drop the tank to fix this, it would be a good time to do the in tank mods (Hutch & Harpoon) so you don't have this issue again. Welcome to guzzle's In-tank Hutch Mod Web Page

 

Sorry for wrong area and thanks for the help. Larry

 

Wow thanks mixing screens plugged solid thanks again!!!! do the 6.0 have these screens also?

 

Yes Chris i think the same it hapen when i try climbing on the hill check tank what you can do unplug the fuel pump on back and flush with air thru tank help for now but soon you have to drop tank . When this happen again then check if fuel is on top in fuel fileter.