fuel pump blues! Help please
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New User
Joined: May 2007
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fuel pump blues! Help please
I was having trouble starting my truck, and after it started if i stepped on the gas it would just continue to idle and after a few seconds it would catch. It went from this to being very hard to start, and almost no responce to stepping on the gas, or backfireing. Now it wont run at all. So I disconected the fuel lines and turned on the key both pumps seem to work, at least they both pump fuel. Where do I go from here? I had to take the box off to get at the pumps, so everything is in the open. Oh ya I also changed fuel filter.
Elder User
Joined: Feb 2007
Posts: 707
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From: Mulege south Baja ca. Mx.
you need to check the fuel pressure at the rail. and check to see if the injectors are firing. if you think your problem is fuel. but it can be many other things. trey to get the codes and check all of the vacuum lines and electrical connections.
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
Knowing something about the truck would be helpful. Year, model, engine, etc. Also, dual tanks? Does it do it on both tanks?
Like Bruce said, it could be the fuel pump, but it could be about 150 other things too.
Like Bruce said, it could be the fuel pump, but it could be about 150 other things too.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
As I understand it the computer adjusts the fuel pressure by changing the voltage on the pumps and you do not have a fuel pressure regulator anymore. I know very little about your fuel system on your 2003 F150. You could have a bad fuel pressure sensor.
Maybe if you asked in the fuel forum someone may know something about it but I have seen very little on your fuel system in the forums.
If you do not have a 2003 then please disregard this post but that is what your profile says.
Maybe if you asked in the fuel forum someone may know something about it but I have seen very little on your fuel system in the forums.
If you do not have a 2003 then please disregard this post but that is what your profile says.
Elder User
Joined: Feb 2007
Posts: 707
Likes: 1
From: Mulege south Baja ca. Mx.
dont worry some of these guys get a little testy late at night but they are a good bunch and can help allot.
try to test the pressure at the rail. and get codes and we will go from there
try to test the pressure at the rail. and get codes and we will go from there
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
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New User
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Hey thanks a lot you guys! I'll test pressure at rail, and read codes. Makes sense, sure appreciate your help thanks again.
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