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my 01 f-350 utility bed work truck while crusing at around 40 mph or 70 will "hiccup" real bad. also when slowing to stop or sitting at a light, sometimes it will die just like i turned off the key. :doh: its been driving me crazy. I checked the air filter, fuel filter and tried blowing air back into the tank from under the truck just before the inline pump. nothing seemed to change. the guy from mission valley ford says he thinks its the lining in the fuel tank comming off.
thanks in advance.
Brian
 

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Have you checked for codes? Checked CPS? Check fuel pressure at the filter? I think this is where I'd start.
 

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I agree, sounds like a CPS.
 

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CPS. did the same to me 2 times since December.
 
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