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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

very odd starting issue

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Old Aug 4, 2025 | 06:34 PM
  #16  
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Bad computer most likely. If the computer does not see a string of PIP pulses the CEL will stay illuminated while cranking.

The fuel pump staying energized is another sign of a bad computer.
 
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Old Aug 4, 2025 | 06:55 PM
  #17  
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i would assume the few times i have got it to start are just a fluke? and i should still assume bad ecm?
 
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Old Aug 4, 2025 | 08:06 PM
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Re-read your post and responses. I know what I would do. Your choice to proceed down your chosen path.
 
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Old Sep 7, 2025 | 07:21 PM
  #19  
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well i finally had time to get back to this and i am in process of searching for a ECM so question is this my ecm part number is f4tf-12a650-aaa (hogo) all i can find seem to be F4TF-12A650-BBC does it truly matter aslong as it is from same year and a 5.0l engine?
 
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Old Sep 8, 2025 | 07:11 AM
  #20  
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It does matter as far as which transmission is in the truck. HOGO is for a 5L/E4OD. F4TF-12A650-BBC (BUG2) is for a 5L/4R70W combination. Those computer are not interchangeable.
 
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Old Sep 8, 2025 | 07:59 AM
  #21  
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ok that figures guess it is time to start looking online then
 
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Old Sep 26, 2025 | 09:07 PM
  #22  
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ok as long as it is a hogo from a 5L/E4OD should it work? I just came across a F4TF-12A650-APA local just hate to go pick it up and just cause more issues
 
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Old Oct 2, 2025 | 11:35 AM
  #23  
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F4TF-12A650-APA has Catch Code HUG0. It is designed for trucks with a 5L/4R70W combination.
 
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Old Oct 2, 2025 | 11:46 AM
  #24  
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drats wrong transmission back to the hunt
 
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Old Oct 21, 2025 | 04:29 PM
  #25  
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well I finally found a ECU local and it tries to start but won't fully start. Any suggestions on what to check besides the timing?
 
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Old Oct 21, 2025 | 04:42 PM
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What ECU? Show pictures?

So, you changed he ECU and you have the same problem?
 
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Old Oct 21, 2025 | 05:45 PM
  #27  
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No, before the ecu replacement, it just spun. Now it tries to start but never seems to get there be able to stay running if that makes sense
Originally Posted by wwhite
What ECU? Show pictures?

So, you changed he ECU and you have the same problem?
 
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