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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

When A Fuel Pump Goes Out Does....

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Old May 9, 2010 | 09:31 PM
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FlyCool5.0's Avatar
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From: Prairie Village, KS
When A Fuel Pump Goes Out Does....

It Completely Go Out Or Should It Still Make The Priming Sound When You Turn The Key. I Can Hear Some Sort Of Relay (I Think) when I turn the key but the front pump no longer runs or makes the priming sound?

1995 F150
 
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Old May 9, 2010 | 09:44 PM
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Take some starter fluid and spray it into the throttle body and if it starts it's the fuel pump most likely.
 
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Old May 9, 2010 | 09:47 PM
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it is not a good idea to spray starting fluid in to the intake.
 
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Old May 9, 2010 | 09:52 PM
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This is what I and my boss have always done. He's been in the business for years and years. As long you just spray a little and just do it to diagnose this you'll be fine.
 
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Old May 9, 2010 | 10:33 PM
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If it doesnt prime when you turn the key, its 98.99% chance the pump has died.
And starting won't hurt it,just spray a 1 second stream then try cranking.
 
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Old May 9, 2010 | 11:43 PM
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Thank you neal. You spray it there because it is directly giving the engine "fuel" and if it starts then you know you aren't getting fuel delivered.
 
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Old May 10, 2010 | 04:32 AM
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From: scottsdale
there is another way, though starting fluid dont hurt you know that.... whats the name.... not zerc fitting is it? the one that looks like a tire valve >.> anywhozle.......

turn the key on with front tank engaged pop the hood and on *(the drivers side next to the... air intake manafold)* there should be that little tire valve dealy.... take a nail and depress the valve it gas dont get all over your hand then your pump is bad ^.^


but dont worry just yet my friend its never a bad idea to jump the relay just to make sure......

and if your pump is bad

drop the tank pull the pump soak it in PB BLASTER* for about.... 2-3 hours then hook some test leads up to it and cross em on your + and - terminals and 9 times out of 10 she will start wherllin again ^.^


*()* indicates that that is the location of the 302/5.0 and 351/5.8 engines
 
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Old May 10, 2010 | 11:53 PM
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Originally Posted by chillmiller
there is another way, though starting fluid dont hurt you know that.... whats the name.... not zerc fitting is it? the one that looks like a tire valve >.> anywhozle.......
schrader valve
 
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Old May 10, 2010 | 11:55 PM
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Your pump probably is going out. Ive had some that die outright, some that fizzle out, and some that intermittently go out. Best thing to do is to get a fuel pressure gauge They are like $40 and as long as you own a fuel-injected vehicle you will use it.
 
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