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Semicold start difficult - what is the problem?

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Old Apr 25, 2014 | 04:22 PM
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E150 4.9 1990's Avatar
E150 4.9 1990
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Semicold start difficult - what is the problem?

My 5.8 engined 96 Econoline fires up perfectly cold and hot, right after sopping it but if I leave it there for 10-15 minutes then I must start longer. Sometimes i am affraid it won't start. Why? It feels as it would take longer until the mixture gets in the cylinders.

Some people say it is a construction specificity, I don't think so.
 
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Old May 2, 2014 | 08:29 AM
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Do you have an odb reader? Try pulling error codes, often on fuel injected engines theese kinds of problems comes from random electronic sensors malfunctioning.
 
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Old May 2, 2014 | 01:44 PM
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Originally Posted by Pellas
Do you have an odb reader? Try pulling error codes, often on fuel injected engines theese kinds of problems comes from random electronic sensors malfunctioning.
Wouldn't light the CEL then? It not even flashes, never nothing.
 
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Old May 2, 2014 | 03:12 PM
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Originally Posted by E150 4.9 1990
Wouldn't light the CEL then? It not even flashes, never nothing.
Doesn't always on all cars, i'm not sure how it'll be with theese in particular.
 
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Old May 2, 2014 | 05:24 PM
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Codes can be set without the CE light ever illuminating so it's a good idea to make this your first troubleshooting step. Another possible cause is low fuel pressure, check it cold and when the problem presents itself, should see close to 40psi within a couple primes of the pump engine not started.
 
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Old May 6, 2014 | 03:23 AM
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Thank you guys! I'll check it. My fuel pump is new and my filter as well, so I don't think that but I check, it's a chinese pump...everything is possible.
 
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