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4.9L Studder

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Old Feb 27, 2017 | 08:51 PM
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Sehandly's Avatar
Sehandly
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4.9L Studder

My 1995 F150 4.9L runs fine when the front fuel tank is being used. However, when switched to the rear tank, it runs like it is either fuel starved or too much fuel. I'm thinking the fuel pressure regulator may be at fault. Fuel lines were replaced several years ago. Thoughts & ideas?

Thanks,
 
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Old Feb 27, 2017 | 09:13 PM
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not sure if the haynes manual includes the test procedure for testing the fuel regulator.

might try finding a service manual that includes the procedure
 
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Old Feb 27, 2017 | 09:16 PM
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Originally Posted by Sehandly
My 1995 F150 4.9L runs fine when the front fuel tank is being used. However, when switched to the rear tank, it runs like it is either fuel starved or too much fuel. I'm thinking the fuel pressure regulator may be at fault. Fuel lines were replaced several years ago. Thoughts & ideas?

Thanks,
There is only one fuel pressure regulator so if the truck runs fine on the front tank, it's not your root cause.

Test the fuel pressure while running on each tank.
 
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Old Feb 27, 2017 | 10:33 PM
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a bad fuel pressure regulator would most likely affect both tanks.
my next move would be a fuel pressure test.
 
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Old Mar 2, 2017 | 09:05 AM
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Thanks for the advice. I was thinking a bad regulator would affect regardless of the tank. I'll check the fuel pressure on each tank.
 
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