Bucking after running for 100miles + - Ford Powerstroke Diesel Forum

 
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post #1 of 2 Old 11-12-2010, 07:46 PM Thread Starter
rrw
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Bucking after running for 100miles +

Have 99 f-250 with 7.3 powerstroke with 220k miles. I use it for a regular trip of 200 miles and after 100+miles the truck starts bucking. This usally happens after stop at red light and continues until I get to destination. After I get home from the trip the next day it runs fine after it cools off. The check engine light flashes when this happening. I have had it back to Ford dealer three times. Ford has had replaced the A C sensor asy and dropped the fuel tank to replace sock in tank. After these repairs it is still doing the same thing. Any help would be great.
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post #2 of 2 Old 11-15-2010, 05:22 PM
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did they replace the fuel tank when they replaced the sock? ive seen a lot of trucks come in where the inside of the fuel tank rusts out and clogs up the fuel pump pickup screen, causing a gradual loss of fuel pressure. When you let the vehicle sit, the rust/contaminates settle back down in the tank and clear up the fuel pump pickup screen. Not sure if this is your problem but it has the same symptoms.
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