cps problem or fuel? - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 04-01-2007, 07:09 PM Thread Starter
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Exclamation cps problem or fuel?

Ok, I had what I thought was a water in fuel problem but after cleaning it out and hooking back to my 34 ft travel trailer it ran fine for about 30 miles. Then I had massive loss of power again just like lack of fuel. Then the engine starts knocking like injector knock and then it clears up for a while then starts again each time getting in less duration than the last at freeway speed. Now here's the kicker- if I keep the revs down to about 50 mph I can limp along with out it doing it. Could this be the fuel filter clogged again and not getting enough fuel at freeway speeds? Or could it be a cps starting to go? I have never replaced a cps but I did the filter right before I had the water problem then I have not replaced it yet. by the way, I do not get any codes whatsoever.

99 4X4 Superduty extended cab Centurion 7.3 factory turbo Powerstroke, Edge Performance Chip, 2013 Harley Davidson FLHTK Ultra Limited Electra Glide. "Kilt Wearing Old Fart Biker"

Last edited by ridgerunner98570; 04-01-2007 at 07:15 PM. Reason: add to body of messege
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post #2 of 5 Old 04-01-2007, 07:28 PM
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i had that knocking sound as well, loss of power blah blah blah. ended up being my fuel pump went out. might try checking your injectors if you can.

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post #3 of 5 Old 04-01-2007, 07:30 PM
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It sounds like fuel to me i didn't think the cps could go in and out like that but i don't know, but will let some of the other guys chime in & see what they say.

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post #4 of 5 Old 04-03-2007, 05:26 PM
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I would have to say fuel pump and you might want to have the sending unit checked too. Mine was doing the same thing and 3 fuel pumps later they are finally changing the sending unit.

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post #5 of 5 Old 04-05-2007, 12:28 PM Thread Starter
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99 7.3 turbo

Well I found out what the problem was, I had gotten algae in my fuel tank and it had plugged up the fuel filters that are in the tank. They had to remove the tank at a cost of 464.00$ and the loss of a full tank of fuel. Truck is now running great again. All they did was use hot water to clean the tank after they removed the filters and tank from the truck. Butte Montana Ford did the job and I thank them.

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