Confounded
Senior User
Joined: Aug 2007
Posts: 412
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From: Fresno, CA
The pump is on the frame rail like under the drivers seat. You should hear it run pretty easily. Also make SURE you have at least 1/4 tank of fuel or it could just be sucking air from the pickup.
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Senior User
Joined: Mar 2007
Posts: 491
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From: Kingsland, GA
I know I have at least 1/3 tank. I'm just limited to when I can get to it so I have to be very choosy about what path to go down when I work on it. I'm trying to get as much input as I can before I go and doing something or buy something.
Postmaster
Joined: Dec 2008
Posts: 3,340
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If you can start the truck that means the pump is running. I guess the pump could be weak. You could have clogged screens in the tank. Did you ever check the fuel pressure? Clay in my signature has a good deal on an oem pump if you need one.
http://www.riffraffdiesel.com/mm5/me...de=F731-OEM-FS
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Senior User
Joined: Mar 2007
Posts: 491
Likes: 0
From: Kingsland, GA
I can start the truck but the bowl didn't refill when I turned on the key. It doesn't make any sound once I turn the key. I when ahead and order a pump and a HP oil Crossover.
Senior User
Joined: Aug 2007
Posts: 412
Likes: 0
From: Fresno, CA
If you can start the truck that means the pump is running. I guess the pump could be weak. You could have clogged screens in the tank. Did you ever check the fuel pressure? Clay in my signature has a good deal on an oem pump if you need one.
Riffraff Diesel: Bosch Electric Fuel Pump
Riffraff Diesel: Bosch Electric Fuel Pump
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
Ok, I ran it for about 30 minutes and checked Rotational Velocity Change on no. 8. After it warmed up it ran about 4 to 6%. I ran Cylinder Contribution Test and it threw the same code as earlier. It smoked white the whole time and gradually got alittle better as it warmed up. The more RPMs the more white smoke. It also threw something about a Exhaust Back Pressure Valve Range when I ran the KOER Test. I'm thinking maybe some bad injector o-rings or fuel delivery issues. Any advice before I pull the Valve Covers Off? Also, how long does it take to pull the valve covers, I will be working in a shop that I have to have the truck out when it closes.
Could you run that long w/o a working fuel pump?
Senior User
Joined: Aug 2007
Posts: 412
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From: Fresno, CA
Really I'm not sure. You could do it on a dying fuel pump.
