courtesycab

can some one please with the problem we are having..
we are working on a 2004 f150 xlt 2 wheel drive 4.6.
Here is how it went.
we changed oil and fuel filter.Drove truck 3 or 4 miles came back to shop,turned truck off. Went to start it 3 hrs later and no start.. just turns over like there is no fuel.scanned it with modis and codes came up
p0121,p2104,p2106,p2111,p2135.... so we switch out the throttle body and the truck fired up and ran fine. Checked the codes and they were gone. so reset all settings etc.. ran the truck back and forth to work for 2 days , (about 50 miles or so) then driving back to work it died on me driving down... towed it back to my shop,so we decided to swap out fuel pump..put new fuel pump in,fired right up.. sounds perfect,it ran about 2 mins then died....now we are back to same problem, the truck turns over (like there is no fuel) and doesn't fire....fuel press on modis says 48 -54 psi +-..
after we mess with the pump off and on with the scanner, it did fire up ran smooth for 1 min then soon as you touch gas, dies... now it wont start at all...
can someone please if you have had this problem? thanks for the input..

jmoon4

Someone else with more input may chime in, but you could check the fuel pump driver module located near the spare tire. If it's corroded real bad, then chances are its bad.

courtesycab

we checked that and its fine, we have good fuel pressure etc... on a cold start it will fire up and run about 45 sec perfect then dies...

primalurges

Have you checked fuel filter to ensure arrow is pointing at line going to engine?

courtesycab

yes... that it what i thought at 1st... i put a wix on there , took it off tried another too....seem like it is in the engine compartment?

Especial86

iTrader: (1)

Is your FPDM on risers? If not, then change it anyway... You have to remove it in order to see how badly its corroded sometimes..

techrep

iTrader: (1)

^^^Agree^^^ remove it and check it...can be intermittent