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Old Aug 6, 2013 | 07:37 PM
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fuel issue

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???
 
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Old Aug 6, 2013 | 08:20 PM
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When you say it runs out of fuel, is the fuel bowl empty when it dies?
 
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Old Aug 6, 2013 | 08:55 PM
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Try cleaning your fpr screen too. But ya need a little more info.
 
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Old Aug 6, 2013 | 09:01 PM
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Tank pick up clogged ?
 
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Old Aug 6, 2013 | 09:04 PM
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bad pump out of the box? did u check fuel pressure?
 
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Old Aug 6, 2013 | 09:29 PM
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Originally Posted by JWC 3
Tank pick up clogged ?
X2^^^^^^^^^
 
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Old Aug 6, 2013 | 11:09 PM
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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...
 
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Old Aug 6, 2013 | 11:15 PM
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Did you unhook any of the vc pigtails.ill bet you got some burnt pins .
 
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Old Aug 7, 2013 | 07:27 AM
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x^^^, mine acted like it was running out of fuel when my UVCH pigtails were burned.
 
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Old Aug 7, 2013 | 03:24 PM
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Originally Posted by oldbird1965
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
 
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Old Aug 7, 2013 | 08:04 PM
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Were they all spiting oil?
 
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Old Aug 7, 2013 | 08:12 PM
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Also was any oil oozing up around the base of the injector?
 
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Old Aug 7, 2013 | 08:48 PM
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Originally Posted by fordman67
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)
 
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Old Aug 7, 2013 | 09:10 PM
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Should only be 65-75psi.
 
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Old Aug 7, 2013 | 09:36 PM
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How are you checking fuel pressure?
 
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