On my 97 f250 7.3 is starving for fuel, acts like it is running out.. changed mechanical fuel pump, filter and bypassed fuel tank selector valve and it still runs out of fuel and dies under a load. runs fine at idle... any ideas???

 

When you say it runs out of fuel, is the fuel bowl empty when it dies?

 

Try cleaning your fpr screen too. But ya need a little more info.

 

Tank pick up clogged ?

 

bad pump out of the box? did u check fuel pressure?

 

X2^^^^^^^^^

 

fuel bowl is not empty, have now checked fuel delivery and is good pressure coming out of filter housing. So am not thinking it's fuel even though it starts missing like it's running out of fuel, starting checking wiring into valve covers and after playing with the harness it is running better but still develops a miss after a hard load but will keep running when before it would stall and have a real hard time refiring...

 

Did you unhook any of the vc pigtails.ill bet you got some burnt pins .

 

x^^^, mine acted like it was running out of fuel when my UVCH pigtails were burned.

 

Pig tails are all good, pulled valve covers and started engine unplugged each injector and found that the front injector on each side showed little difference in idling

 

Were they all spiting oil?

 

Also was any oil oozing up around the base of the injector?

 

yes they all appeared to be spitting oil and no did not see any oozing. just checked fuel pressure just to make sure and go a reading around 110 pounds and fluttering at idle. don't know what normal should be and just for giggles I changed the cps which made no difference. And now it's smoking real bad (blueish/white)

 

Should only be 65-75psi.

 

How are you checking fuel pressure?