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Old February 19th, 2010, 09:02 PM   #1
prostock2414
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Default 89 ford f150 running problems

i have a 89 for f150 with a 351w and it will run fine at idel but if you hold it at a set rpm like 2500 to 3000 for 2-3 mins it will bogg out till it dies ive changes the spark plugs new fuel filter and i still cant figure it out filled the tank so have any advice thanks
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Old February 20th, 2010, 12:22 AM   #2
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bump
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Old February 20th, 2010, 12:49 AM   #3
MiNi Beast
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have you checked the pump? sounds like a bad fuel pump to me.
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Old February 20th, 2010, 09:06 AM   #4
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is that free revving or under load? I would check fuel pressure/volume and look into secondary ignition...also make sure there are no vacuum leaks, pay close attention around the intake gasket
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Old February 20th, 2010, 03:16 PM   #5
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Quote:
Originally Posted by MiNi Beast View Post
have you checked the pump? sounds like a bad fuel pump to me.
agreed, if you have a multimeter you should just be able to check the continutity (ohms) and that'll tell you if your pump's fried
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Old February 20th, 2010, 03:51 PM   #6
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agreed, if you have a multimeter you should just be able to check the continutity (ohms) and that'll tell you if your pump's fried
that will tell if the pump motor is ok, but not the rest of the pump...best bet is to check flow rate and pressure
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Old February 20th, 2010, 04:01 PM   #7
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yea...do f150s have the place on the fuel rail where you can hook a gauge up?
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Old February 20th, 2010, 05:38 PM   #8
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Yes they do
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