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08 4.2 misfire

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  #16  
Old 03-15-2019, 09:49 PM
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Well it’s the computer and those are hard to find
 
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  #17  
Old 03-15-2019, 10:10 PM
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How was that determined?
 
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Old 03-15-2019, 10:45 PM
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Had the Ford dealership diagnosi it. They suggested that I reswap the coil pack for a motorcraft one and if that didn’t work it was the computer. Also have talked with others who program them and it’s the same opinion.
 
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  #19  
Old 03-15-2019, 11:46 PM
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Tasca has them for just under $400, reman. Item #6:

https://www.tascaparts.com/auto-part...n-control-scat
 
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Old 03-16-2019, 12:11 AM
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Ordered one from flagship 1 for $275 lifetime warranty
hopefully this solves it.
 
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  #21  
Old 03-16-2019, 12:10 PM
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That's interesting. I wonder how you'll like it.

Flagship 1 seems to have some sketchy reviews...

Let us know how you make out!
 
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  #22  
Old 04-05-2019, 05:16 PM
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Update
changed the computer and now have a rough idle and some backfiring. Showing code P0171 what should I look at?
 
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  #23  
Old 04-05-2019, 06:15 PM
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Carefully check to make sure the wires are on the correct cylinders from the EDIS.

Very common mistake -- even pros make.
 
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Old 04-05-2019, 06:37 PM
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Check for vacuum leaks.
 
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Old 04-05-2019, 06:44 PM
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Originally Posted by ManualF150
Carefully check to make sure the wires are on the correct cylinders from the EDIS.

Very common mistake -- even pros make.
dont mean to sound stupid but edis?
 
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  #26  
Old 04-05-2019, 06:49 PM
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EDIS = Electronic Distributor... coil pack... whatever you want to call it.

Make sure the wires are plugged in correctly on both the coil pack and on the right plug.

Here's a diagram:
 
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