1996 F250 4x4 starts, idles rough, dies in gear - Ford Truck Enthusiasts Forums



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1996 F250 4x4 starts, idles rough, dies in gear

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Old 08-17-2014, 03:38 PM
mustangnewby mustangnewby is offline
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1996 F250 4x4 starts, idles rough, dies in gear

While driving today I hit a large bump going 35 and my truck started to run rough and died. It will start and idle rough and then die when put in gear. I switched to the rear tank and it idled fine and ran in gear. What will cause it to run rough on the front tank and die in gear but run perfectly fine on the second tank?
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Old 08-17-2014, 04:56 PM
49FarmallM 49FarmallM is offline
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Probably broke the pickup tube in the tank or the wire on the valve body that controls the selection of the tank. 460, 351, or 7.3l?
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Old 08-17-2014, 05:04 PM
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It's a 460.
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Old 08-17-2014, 05:28 PM
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I am still able to choose between both tanks. It idles normally w the rear tank, but idles poorly on the first tank. If I push the gas pedal on the first tank it stutters and is slow to respond.
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Old 08-17-2014, 07:23 PM
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Any other ideas?
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Old 08-17-2014, 10:02 PM
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Your truck has a high pressure pump in each tank. The front one may be weak. Rent a fuel pressure tester.
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Old 08-19-2014, 02:47 PM
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TTT anyone else?
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Old 08-19-2014, 02:56 PM
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Listen to RLA. That will give you an idea of whats wrong. If you don't follow the testing we tell you to do you won't get anywhere...
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Old 08-19-2014, 02:59 PM
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Ok appreciate it, how many psi should I see?
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Old 08-19-2014, 03:01 PM
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~32 at idle with the vacuum line attached to the regulator. When removed it should jump up to ~39 psi.
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