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Engine dies upon start up constantly.

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Old 05-13-2014, 05:30 AM
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Default Engine dies upon start up constantly.

2003 5.4. 220k
Replaced fuel pump, fuel treatment, did not correct problem. Idles fine, runs fantastic, takes atleast 3 attempts at crank to hold idle. Any suggestions?
Old 07-02-2014, 05:57 PM
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Is your fuel filter new? I had a problem with a carburetor once like that, when you first turn it over it gives a little 'extra squirt' of fuel. That little pump went on me and so I had the same problem. So on a newer truck could it be an injector or computer thing? Maybe timing?
Just throwing a few ideas out there, I'm no mechanic.
Old 12-03-2014, 06:22 AM
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Maybe the idle air control valve? I had a similar issue with a 99 5.4. Truck started and ran fine with slight throttle input but wouldn't stay running with my foot off the pedal.



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