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Interested in swapping your 4.6 to a 5.4? This thread lists several problems you may run in to. The most common are:

          Read the full discussion below to find out how to deal with the common issues.
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          4.6 to 5.4 Swap Notes

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            #16  
          Old 02-25-2009, 08:08 AM
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          Just want to thank you for your hard work, JMC. I have an extended-cab, long-bed F-150 with the 4.6L and a M5OD that I have been dreaming of swapping to a 5.4L some day, and the information you've provided really helps!

          It may take a year from now, but I really like the manual tranny in a truck way too much to give up on it and just buy a newer truck. I would, however, like to make the whole system less dependent on computers to make the whole truck run, but I don't think that would be possible as old-style distributors were never made for these engines.
           
            #17  
          Old 03-16-2009, 12:22 PM
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          Jean,
          i have done the swap from the 4.6 to the 5.4 and have used the 4.6 harness as you descibed. i am not getting any spark at the plugs. any ideas?
          thanks
          Scott
           
            #18  
          Old 03-16-2009, 01:28 PM
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          Originally Posted by scooter68
          Jean,
          i have done the swap from the 4.6 to the 5.4 and have used the 4.6 harness as you descibed. i am not getting any spark at the plugs. any ideas?
          thanks
          Scott
          What year 5.4 did you use and what year is the 4.6?

          Regards

          Jean Marc Chartier
           
            #19  
          Old 03-16-2009, 01:38 PM
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          Both are 98's
           
            #20  
          Old 03-19-2009, 12:59 PM
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          Jean,
          just wondering if you had any thoughts on my issue?
          thanks
          Scott
           
            #21  
          Old 03-19-2009, 02:12 PM
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          What did you use for an ignition system? COP from the 5.4 or the coil packs and plug wires from the 4.6?




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            #22  
          Old 03-19-2009, 02:32 PM
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          coil packs and wires from the 4.6
           
            #23  
          Old 03-19-2009, 04:16 PM
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          Swap the cam and crank sensor form your 4.6 onto the 5.4. I would suggest posting this in the V8 engine section. Multiple heads are better than one.

          Regards

          Jean Marc Chartier
           
            #24  
          Old 07-23-2009, 06:35 PM
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          Thanks JMC!
           

          Last edited by stallyn1; 07-30-2009 at 02:08 AM.
            #25  
          Old 08-01-2009, 02:00 PM
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          I have summit headers on my 4.6. will they bolt to the 5.4? Summit lists different part numbers for the headers, but the same gasket. ???
           
            #26  
          Old 08-01-2009, 08:32 PM
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          They should bolt up but they will not be in the proper location to connect the exhaust collector. Not a big issue if you are going with a custom exhaust.

          .
           
            #27  
          Old 08-02-2009, 03:35 PM
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          does it matter what year of 5.4 i use? or should i saw which year is easier and which is better?
           
            #28  
          Old 08-02-2009, 05:06 PM
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          I am partial to he 99 model year. It has a forged crankshaft, metal intake manifold and Power improved heads.

          Regards

          Jean Marc Chartier
           
            #29  
          Old 08-03-2009, 07:17 PM
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          Was there only one year for a forged crankshaft?
           
            #30  
          Old 08-03-2009, 09:06 PM
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          1999 was the only year that had all three. It was the first and only year of the Pi heads in the F-150 with metal intake manifold. In 2000 they switched to a plastic intake.

          Regards

          Jean Marc Chartier
           


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