99 F-250 Trouble starting and running rough - Ford Powerstroke Diesel Forum
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Old 12-28-2007, 07:00 AM
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99 F-250 Trouble starting and running rough

I have a 99 F-250 7.3L powerstroke. The truck has a real problem when it sits overnight (7 or more hours)...The truck will not start unless the block warmer is plugged in. Tempature does not matter, it can be 80 degrees outside and it still wont start if it sits overnight. If the truck sits for a few hours it takes a few cranks but will start. After the truck starts it runs really rough until you run it for about 30 mins. If I leave the block warmer plugged in overnight it will start without any real problems but it still runs rough until it gets fully warmed up. This problem has grown and is getting worse every day. Also the glow plugs are new and are working fine.
Please help I am lost and dont know what to do.. Thanks!
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Old 12-28-2007, 07:06 AM
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Do you have the capability to read the DTC's? Also, how long have you been noticing this?
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Old 12-28-2007, 07:11 AM
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The only troublecode I have is the IDM circuit..I believe its p1316. The first sign of the problem started about 5 months ago.
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Old 12-28-2007, 07:52 AM
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1316 tells you that there are IDM fault codes present. Due to the engine control startegy, these can be stored as either hard faults or memory codes in the KOEO test. If you erase the 1316 codes, you have just erased the other codes. You can contact me directly at mcleary@atsstraining.com for help.

Mike Cleary; Ford Senior Master technician and Powerstroke Specialist
Owner/Educator/Technician
ATSS
Specializing in Ford Vehicle Systems Training
Fresno, CA (3729
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Old 12-28-2007, 03:52 PM
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Ok, I will contact you when I go to fix the IDM... But this still dosent solve the starting problem?
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Old 12-28-2007, 04:46 PM
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P1316 does not mean you have a defective IDM. In fact, although it is a possibility, I doubt if the IDM is the cause of your problem.

Mike Cleary; Ford Senior Master technician and Powerstroke Specialist
Owner/Educator/Technician
ATSS
Specializing in Ford Vehicle Systems Training
Fresno, CA 93729
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