7.3 missing and running ruff - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 09-22-2018, 07:36 PM Thread Starter
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7.3 missing and running ruff

So I was coming back from a hay delivery with my 30ft gooseneck in my 02 7.3 4x4 and I pushed down on pedal to pass a car on the interstate and my truck starred running ruff missing like it was staving for fuel I had a friend get me a new fuel filter and I put a inline fuel filter about a year ago that I changed to Still running bad no power so I had my brother come get me in my other truck ran the broke truck on the trailer and drive home So it did this the night before but I thought it just ran out of fuel put fuel in it It started off running a little rough but cleared up after a few miles Started up fine the next morning and ran fine drove 80 miles and unloaded 200 bales and on the way back all this happened I think it has something to do with giving it a lot of gas seems like it happened both times One other thing I shot Either in it and seemed to run fine with no miss But once the either was gone started running rough again
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post #2 of 9 Old 09-23-2018, 04:42 AM
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Clogged injectors? Water in fuel? I would start with AR6200 or Lucas Upper Cylinder Lube and Injector Cleaner at a slightly higher dose. I would not use ether as I believe it is for gas engines only.

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post #3 of 9 Old 09-23-2018, 06:47 PM
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Had a similar issue with my old 7.3. It would idle and ran fine at low speed but when I started pulling it would knock and sounded like a rod bearing. I would back off the throttle and it would be OK. Power was down WHEN it was knocking. It ended up being the black pickup in the tank had literally turned brittle and fell apart. It was clogging the pickup line. I just removed it and did the Hutch mod and problem solved. I was also running an inline Racor between the tank and pump.

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post #4 of 9 Old 09-23-2018, 09:20 PM Thread Starter
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Originally Posted by tomshep View Post
Had a similar issue with my old 7.3. It would idle and ran fine at low speed but when I started pulling it would knock and sounded like a rod bearing. I would back off the throttle and it would be OK. Power was down WHEN it was knocking. It ended up being the black pickup in the tank had literally turned brittle and fell apart. It was clogging the pickup line. I just removed it and did the Hutch mod and problem solved. I was also running an inline Racor between the tank and pump.

Tom
Th


Thanks Tom I was thinking that was what it might be but wanted a second or third opinion I will check it and let you know
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post #5 of 9 Old 09-24-2018, 06:04 AM
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And you've never seen the SES light on when it's done this?

If not, that kinda points towards to an "un-monitored" system like Fuel delivery...
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post #6 of 9 Old 09-24-2018, 06:32 AM
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Did you run the truck dry? If it ran out of fuel I'm sure the fuel pump didn't like that. Pull tank, inspect, pull pump, replace

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post #7 of 9 Old 09-24-2018, 08:59 PM Thread Starter
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No lights ever came on and I didn't run it out of fuel But I am almost sure Tom is right I dropped the fuel tank tonight after work and the black pick up screen was in pieces at the bottom of the tank and the two filters inside are totally clogged up I was also very happy to see that the tank is plastic I've seen what happens to metal fuel tanks and its not a pretty sight I am waiting on one more of the internal filters to come in tomorrow then I will put it back together and see what happens I have heard about a harpoon mod but not feeling very adventurous right now I am going to put it back together how it was But what do y'all think about the hutch mod seems super easy and I would like to get more fuel in the tank I am used to my older truck it is a 2000 long bed with 39 gallon tank I think
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post #8 of 9 Old 09-24-2018, 11:10 PM
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Originally Posted by Cowherdboy View Post
No lights ever came on and I didn't run it out of fuel But I am almost sure Tom is right I dropped the fuel tank tonight after work and the black pick up screen was in pieces at the bottom of the tank and the two filters inside are totally clogged up I was also very happy to see that the tank is plastic I've seen what happens to metal fuel tanks and its not a pretty sight I am waiting on one more of the internal filters to come in tomorrow then I will put it back together and see what happens I have heard about a harpoon mod but not feeling very adventurous right now I am going to put it back together how it was But what do y'all think about the hutch mod seems super easy and I would like to get more fuel in the tank I am used to my older truck it is a 2000 long bed with 39 gallon tank I think
Definately cut the tube off on the inside. Makes a huge difference
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post #9 of 9 Old 09-28-2018, 11:00 PM Thread Starter
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So that's exactly what it was Tom The black foot screen thing was disintegrated and clogged up the two little filters in the fuel tank sending unit I replaced them and the foot screen and it seems to be running great Its funny I have an 02 E350 with a 7.3 that I use for work that has been doing the same thing off and on 3 plus months I dropped the tank and sure enough same thing I haven't put it back together yet but I am almost positive its the same problem
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