run's for an hour or so then start's to die - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 12-23-2009, 08:05 PM Thread Starter
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run's for an hour or so then start's to die

Hello, I have an 02' 7.3 powerstroke diesel with 135,000 on it. Driving up the highway yesterday and I start losing power(pedal to the floor and it keeps slowing down). Come to a stop and shut it down for 5 minutes, start it up and drive it for maybe 30 miles and it starts dying again. This time I have to let it sit longer before it will get going again. Just had the oil changed and had the cam shaft sensor replaced 2 years ago. Replaced the fuel filter twice this summer, because of this problem, and just replaced it again and it's still stalling. Any help would be great and I thank you in advance.
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post #2 of 7 Old 12-23-2009, 08:14 PM
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Sounds like the fuel pump is on its way out. I had those exact same symptoms with a chevy gasser fuel pump once, when it started to heat up the bearings would get tight and slow the pump down.

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post #3 of 7 Old 12-23-2009, 08:17 PM
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there have been several org members that have had the same problem with their 7.3's, including me, ended up being the IDM. check codes if you can before replacing it cuz it is a rather expensive.

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post #4 of 7 Old 12-23-2009, 08:23 PM
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/\ second that my IDM took a dump on me this summer. but since its still drivable im not sure its the IDM . pull the codes and youll be able to narrow it down. there will be codes even if the SES light isnt on.

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post #5 of 7 Old 12-23-2009, 08:30 PM
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Originally Posted by cliford View Post
/\ second that my IDM took a dump on me this summer. but since its still drivable im not sure its the IDM . pull the codes and youll be able to narrow it down. there will be codes even if the SES light isnt on.
a bad IDM still allows you to drive around, you just had random losses of power as he described............

if you see a light at the end of the tunnel, it's probably just a photon torpedo
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post #6 of 7 Old 12-23-2009, 08:44 PM
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yea when mine went out it was only showing symptoms for a week until it completely took a crap and i could start it and thats about it. would an idm go bad and last from summer until now?

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post #7 of 7 Old 12-23-2009, 10:01 PM
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Sounds like the fuel pump to me too. Im still learning but sounds like its not able to keep up with the fuel demand that is used during driving. I e More Fuel. So its using up what is in the bowl and isnt replacing it fast enough. But definitly pull the codes first.

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