Fuel pump?

[jacob96]

hello, i have a 96 f250, it died on me a few months ago, i replaced the cps and checked a bunch of other stuff i cant remember it all now. anyways i had drained the fuel bowl for some reason or another and i noticed that after 3 or 4 minutes worth of cranking that the bowl only filled about 1/4 of the way, shouldnt it have filled completely? am i looking at a new fuel pump? any help would be appreciated. i had given up working on it untill the weather got nicer but im gonna need to use it here soon so i need to get it fixed if possible.

[jacob96]

well i bought a new fuel pump today and put it on, it pumps fuel now but still wont start i dont know what to do now, i have auto enginuity but it wont work on my laptop for some reason and taking the truck to a shop isnt an option

[mthayer]

You may need to crank on it a bit on it to get the air out of the injectors. ON my 97 sometimes after changing the fuel filter, It will run for while there is still fuel in the injector lines, and then it will die and I have to crank it for the air to bleed out. Check the HPOP and make sure its building up pressure. That could be your problem.

[jacob96]

i cranked until my brand new batteries died(not all at once, i already got my starter rebuilt once) how do i check the hpop pressure?

[mthayer]

Your going to need to get a scan tool that will be able to read the HPOP. If you have any friends with scan tools that can read the HPOP then get them to scan it for you. You may have to end up paying someone to come and scan it for you. The scanners run about 8k that are able to read the HPOP.

[jacob96]

i finally got AE to work. but no codes are stored. i have a question, if my fuel pump had gone out would the injector pump pump the remaining fuel in the bowl out?

[AFBLUE]

Originally Posted by jacob96

i finally got AE to work. but no codes are stored. i have a question, if my fuel pump had gone out would the injector pump pump the remaining fuel in the bowl out?

You dont have an injector pump on PSDs The first stage to the filter is the top of pump 5-8 psi/vac to fuel filter. The its back to the pump 2nd stage/lower part for 60-70psi fuel to heads.

Dont crank the piss out of the truck, 10-15 secs then let starter cool or you are going to kill the batteries and starter along with your original issue. If you are cranking with the bowl lid off, it has a safety valve to prevent you from running without a filter, If the cap isnt on pressing the filter against center post, the fuel pump wont get any fuel.

[jacob96]

im asking if the fuel bowl would have been emptied if there wasnt any pressure coming from the pump?

[mthayer]

The Fuel bowl would be empty if your pump crapped out I believe. If your HPOP crapped out the bowl would be full. My Fuel pump when it was getting weak, the bowl would stay half full. As AFBLUE said, there is not a injector pump anymore on the fords unfortinately. The HPOP (High Pressure Oil Pump) uses oil to fire the injectors. Its funky how the whole system works but youll get used to it if not already.

[AFBLUE]

Just trying to help out man, the mechanical fuel pump usually doesnt just stop working per say. There is a little weep hole in the side of it, and the internals of the pump will push fuel till failure, but they fail by a seal going inside, and you will get fuel leaking out of that week hole.

What I was getting at, are you cranking with the bowl lid off or cranking, then opening it back UP?