Fuel pump/filter?
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Champion
Joined: Jun 2008
Posts: 3,300
Likes: 2
From: Plattsburgh, NY
Fuel pump/filter?
So I started heading back to school after Thanksgiving break tonight and my truck started to break up and jolt under a load especially up hills... No CEL but something is for sure not right. Feels to me like it's not getting fuel, so I'm guessing fuel pump or hopefully just the filter. I turned around and came back home since I was only 15 min from home and I had a 3.5 hour drive. Didn't want to end up stuck on the side of the road in the middle of nowhere up here in Vermont so I'm driving my grandmother's Subaru Legacy for now. Truck will be sitting at home until I'm done for the semester so I won't be able to look at it at all until then but just wanted to get your guy's imput.
Any ideas/thoughts?
Can you change the filter without replacing the whole pump on these dakotas?
Any ideas/thoughts?
Can you change the filter without replacing the whole pump on these dakotas?
Record Breaker
Joined: Jun 2008
Posts: 1,970
Likes: 20
From: Clermont, Florida
It could be any number of things. I don't know anything much about the 4.7 but I bet the fuel systems are the same between your 4.7 and my 3.9. If you suspect the fuel pump or filter first thing is to check the wiring and hoses etc on top of the fuel tank at the fuel pump. If it's OK then get you a cheap fuel pressure testing gauge at Harbor Freight or any parts store. I have this one here, it works great:
http://www.harborfreight.com/fuel-in...ter-92699.html
The Haynes Book will have the specs for your fuel pump and fuel system. The specs probably on here somewhere too. You might have a bad pressure regulator or fuel filter. Both are integral parts of the fuel pump assembly. To replace the filter you have to replace the entire pump assembly. Same for the pressure regulator. It is all one self contained unit, the only thing you can replace separately is the fuel gauge level sending unit. If you have to go to the trouble of R&R'ing the pump, you might as well do the whole pump and be done with it. You have to get to the top of the gas tank to get access to the pump to replace it. You can either drop the gas tank or remove the bed to get to the pump.
If you have a bad fuel pump, it is not that hard of a job. I did mine by myself with about 15 gallons of gas still in the gas tank. It is probably much easier if you have help. Loss of power under load could also be due to something other than the fuel pump too. It could be a bad cat or O2 sensor, bad exhaust or one of the coils could be bad or any one of a lot of other causes. I know nothing about the 4.7 but it seems to me if you had one of those type problems it would throw a code.
At 138K if you have never replaced the fuel pump that would be the first place to start checking. I have read and heard most Dakota fuel pumps fail around 125K. I replaced mine at about 123K I think, but it was still working OK at the time, it just had the early signs of fuel pressure regulator failure, where it would take 5 or 6 extra seconds to start after the truck sat overnight or for any other length of time. I saved $40.00 by using an online discount code and buying from Advance. They had it delivered to the store that same day and called me to come get it. If you need it you can find the most current list of Advance's discount codes on www.retailmenot.com.
Jimmy
http://www.harborfreight.com/fuel-in...ter-92699.html
The Haynes Book will have the specs for your fuel pump and fuel system. The specs probably on here somewhere too. You might have a bad pressure regulator or fuel filter. Both are integral parts of the fuel pump assembly. To replace the filter you have to replace the entire pump assembly. Same for the pressure regulator. It is all one self contained unit, the only thing you can replace separately is the fuel gauge level sending unit. If you have to go to the trouble of R&R'ing the pump, you might as well do the whole pump and be done with it. You have to get to the top of the gas tank to get access to the pump to replace it. You can either drop the gas tank or remove the bed to get to the pump.
If you have a bad fuel pump, it is not that hard of a job. I did mine by myself with about 15 gallons of gas still in the gas tank. It is probably much easier if you have help. Loss of power under load could also be due to something other than the fuel pump too. It could be a bad cat or O2 sensor, bad exhaust or one of the coils could be bad or any one of a lot of other causes. I know nothing about the 4.7 but it seems to me if you had one of those type problems it would throw a code.
At 138K if you have never replaced the fuel pump that would be the first place to start checking. I have read and heard most Dakota fuel pumps fail around 125K. I replaced mine at about 123K I think, but it was still working OK at the time, it just had the early signs of fuel pressure regulator failure, where it would take 5 or 6 extra seconds to start after the truck sat overnight or for any other length of time. I saved $40.00 by using an online discount code and buying from Advance. They had it delivered to the store that same day and called me to come get it. If you need it you can find the most current list of Advance's discount codes on www.retailmenot.com.
Jimmy
Thread Starter
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Champion
Joined: Jun 2008
Posts: 3,300
Likes: 2
From: Plattsburgh, NY
It could be any number of things. I don't know anything much about the 4.7 but I bet the fuel systems are the same between your 4.7 and my 3.9. If you suspect the fuel pump or filter first thing is to check the wiring and hoses etc on top of the fuel tank at the fuel pump. If it's OK then get you a cheap fuel pressure testing gauge at Harbor Freight or any parts store. I have this one here, it works great:
http://www.harborfreight.com/fuel-in...ter-92699.html
The Haynes Book will have the specs for your fuel pump and fuel system. The specs probably on here somewhere too. You might have a bad pressure regulator or fuel filter. Both are integral parts of the fuel pump assembly. To replace the filter you have to replace the entire pump assembly. Same for the pressure regulator. It is all one self contained unit, the only thing you can replace separately is the fuel gauge level sending unit. If you have to go to the trouble of R&R'ing the pump, you might as well do the whole pump and be done with it. You have to get to the top of the gas tank to get access to the pump to replace it. You can either drop the gas tank or remove the bed to get to the pump.
If you have a bad fuel pump, it is not that hard of a job. I did mine by myself with about 15 gallons of gas still in the gas tank. It is probably much easier if you have help. Loss of power under load could also be due to something other than the fuel pump too. It could be a bad cat or O2 sensor, bad exhaust or one of the coils could be bad or any one of a lot of other causes. I know nothing about the 4.7 but it seems to me if you had one of those type problems it would throw a code.
At 138K if you have never replaced the fuel pump that would be the first place to start checking. I have read and heard most Dakota fuel pumps fail around 125K. I replaced mine at about 123K I think, but it was still working OK at the time, it just had the early signs of fuel pressure regulator failure, where it would take 5 or 6 extra seconds to start after the truck sat overnight or for any other length of time. I saved $40.00 by using an online discount code and buying from Advance. They had it delivered to the store that same day and called me to come get it. If you need it you can find the most current list of Advance's discount codes on www.retailmenot.com.
Jimmy
http://www.harborfreight.com/fuel-in...ter-92699.html
The Haynes Book will have the specs for your fuel pump and fuel system. The specs probably on here somewhere too. You might have a bad pressure regulator or fuel filter. Both are integral parts of the fuel pump assembly. To replace the filter you have to replace the entire pump assembly. Same for the pressure regulator. It is all one self contained unit, the only thing you can replace separately is the fuel gauge level sending unit. If you have to go to the trouble of R&R'ing the pump, you might as well do the whole pump and be done with it. You have to get to the top of the gas tank to get access to the pump to replace it. You can either drop the gas tank or remove the bed to get to the pump.
If you have a bad fuel pump, it is not that hard of a job. I did mine by myself with about 15 gallons of gas still in the gas tank. It is probably much easier if you have help. Loss of power under load could also be due to something other than the fuel pump too. It could be a bad cat or O2 sensor, bad exhaust or one of the coils could be bad or any one of a lot of other causes. I know nothing about the 4.7 but it seems to me if you had one of those type problems it would throw a code.
At 138K if you have never replaced the fuel pump that would be the first place to start checking. I have read and heard most Dakota fuel pumps fail around 125K. I replaced mine at about 123K I think, but it was still working OK at the time, it just had the early signs of fuel pressure regulator failure, where it would take 5 or 6 extra seconds to start after the truck sat overnight or for any other length of time. I saved $40.00 by using an online discount code and buying from Advance. They had it delivered to the store that same day and called me to come get it. If you need it you can find the most current list of Advance's discount codes on www.retailmenot.com.
Jimmy
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Thread Starter
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Champion
Joined: Jun 2008
Posts: 3,300
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From: Plattsburgh, NY
I just hate how the fuel pump is one unit where you get to the filter. If it's just a filter it cost $200+ to replace. Instead of $15 like it used to. Plus it's a much more of a pain to get to unlike when it was external in the line somewhere usually along the frame.
Why did they have to go and put the filter in the tank? What was wrong with how it was.
Why did they have to go and put the filter in the tank? What was wrong with how it was.
