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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

fuel pump

 
  #1  
Old 08-11-2009, 08:02 PM
james_leland
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fuel pump

I have a 1994 F-250, The truck started to stall out really bad, so I thought it had to with the timing. so I change the cap, rotor, coil, and the TFI. After all that the truck just turned over and over, wouldn't even start. So after getting shocked to death, my guess is its something with the fuel.. I changed the fuel filter, but I can't hear the pump in the tank, so I was looking for the fuse, and it isn't in the fuse box under the dash. I tested all the ones under the hood. So my question is, is it a relay and if it is, where is that located??
 
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Old 08-11-2009, 08:05 PM
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Well, I doubt its tripped but there is (should be) a small black box under the driver dash on the firewall or whatever. Its an inertia switch. Its got a button on it that can trip. It shuts off the fuel pump in case of emergency. Also, I believe the fuel pump is relay run, not fused although I could be wrong.
 
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Old 08-11-2009, 08:13 PM
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I check that, and it was under the right side of the dash, I re-set it.
 
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Old 08-11-2009, 08:15 PM
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Yeah, some of them are on the right but im not sure how its set up. I got a 150.
 
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Old 08-11-2009, 08:20 PM
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thanks for the help, I hate to do it. I guess when I get back I will have to bring it in to a mech.
 
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Old 08-11-2009, 08:24 PM
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Giving up so easy? Find out if the relay is working. If the relay works you could just have a bad pump. Is it a single tank? Im assuming you would have tried the other if it was a dual but I thought id ask.
 
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Old 08-11-2009, 08:48 PM
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No not giving up at all, I don't know where the relay is. its a single tank.
 
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Old 08-11-2009, 08:58 PM
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Umm, maybe its in the engine compartment on the fender side. Haynes says there is a cover you remove to expose the relays and the locations of various ones are marked on the under side of it.
 
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Old 08-11-2009, 09:05 PM
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checked all of those. and all the fuse are good, check the relays as well. I think when I get back home, I'll just put a new fuel pump in. I looked in the haynes as well, and they don't really show a relay for the fuel pump..
 
  #10  
Old 08-11-2009, 09:07 PM
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I wonder if it isn't that inertia switch, went bad all together??
 
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Old 08-11-2009, 09:13 PM
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Fuel pump and EEC relays are on the drivers inner fender. Before replacing the fuel pump check that the relay is being latched when the key is turned on, if it isn't then the computer is likely the problem.
 
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Old 08-11-2009, 09:18 PM
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Conanski knows his stuff. Listen to him.
 
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Old 08-11-2009, 09:21 PM
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here is how the problem started, the truck ran fine till it got up to temp. Then it would stall, I thought it was the egr vavle cause that is what happened to my 89. changed that. still had same problem. Thought it had to be a timing problem change it all but the dist. Get plenty of spark, truck turns over great just won't fire..
 
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Old 08-11-2009, 09:25 PM
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?Fuel?, <strike>spark</strike>, <strike>air</strike>, ?computer?. Thats basic function.
 
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Old 08-11-2009, 09:29 PM
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you know it, trust me I can use all the advice I can get.
 
 
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