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89 f15 randomly quits like its out of gas?

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Old 01-13-2013, 10:10 PM
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Originally Posted by Aktech
Sounds like it is running out of fuel to me. Put a new fuel filter in. A dirty filter will let gas though it but can keep up with the demand. Or some thing is getting plugged as fuel is following. It would be nice to know what the rail said right when it dies. What do guys think about the fuel regulator going bad? Finish testing the pumps and relay.
Well I dropped the tank the other day thinking it was empty and it was full, replaced the sender, kept old in tank filter on because i tested it by turning the key and it seemed OK. I noticed my truck doesn't make a whining noise when I turn the key. I hear something but I think is just that inner pump.
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Old 01-13-2013, 10:13 PM
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Originally Posted by Just call me Sean
Selected tank pump will pump fuel to the reservoir then the frame pump pressurizes it. Check fuel pressure.
Do you know how I test the pressure? Like where the hook-ups are?
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Old 01-13-2013, 10:15 PM
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We'd do it

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Yes at the test port.
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Old 01-13-2013, 11:25 PM
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Originally Posted by Just call me Sean
Yes at the test port.
What's it labeled as? Can I get a tester at a parts store?
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Old 01-13-2013, 11:47 PM
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The test port is on the fuel rail, its a schrader valve (looks like a tire valve). You can buy or rent a fuel pressure tester at most parts stores.

Fuel pressure specs are 35-45 with key on engine off and 30-40 with the engine running.
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Old 01-14-2013, 12:02 AM
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Thanks, I'll try to test it tomorrow and post the results
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Old 01-14-2013, 12:13 AM
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Have you checked the fuel pump relay to see if its bad?
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Old 01-14-2013, 01:01 AM
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Originally Posted by 87f-150
Have you checked the fuel pump relay to see if its bad?
No,I have not. Simply because it's running fine for now, I'm not sure how to look for results when it runs okay for now
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Old 01-14-2013, 01:10 AM
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Just tap on the relay to see if it starts to run bad or cut off or see if it has a loose connection were it plugs in to the relay.
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Old 01-14-2013, 02:43 AM
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Will do. Thanks
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