5.4 4v swap?
Senior Member
Joined: Apr 2004
Posts: 13,679
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From: missing Texas...
and no the two valve ECM cannot operate em
so a hobs switch is needed
Senior Member
Joined: Apr 2004
Posts: 13,679
Likes: 84
From: missing Texas...
I would think if your keeping the pcm, you would keep the same wiring harness. There's no reason your pcm/sensors wouldn't run the 4v. Same injectors? Prolly would at least need COP adapters.
Really the block on all 4.6/5.4 2/3/4 valve are essentially the same. Given the 5.4 are a lil wider and higher because of the longer stroke.same bore.The timing cover and heads vary.
Your best bet is to read mustang forums and go from there. I wanted to do a 4v but would have a problem bolting my 4.6 2v fly-by-wire TB to the 4V 5.4 intake manifold. I ended up buying mustang adapter plates and bolting in the 2v 5.4 short block. It's the only 2v 5.4 fly by wire truck in existence.
Good luck on your build! Keep us posted!
Really the block on all 4.6/5.4 2/3/4 valve are essentially the same. Given the 5.4 are a lil wider and higher because of the longer stroke.same bore.The timing cover and heads vary.
Your best bet is to read mustang forums and go from there. I wanted to do a 4v but would have a problem bolting my 4.6 2v fly-by-wire TB to the 4V 5.4 intake manifold. I ended up buying mustang adapter plates and bolting in the 2v 5.4 short block. It's the only 2v 5.4 fly by wire truck in existence.
Good luck on your build! Keep us posted!
keep the existing ECM, and the 4r70
swap the motor and engine harness, wire in the IMRC and have a dohc for whatever reason
or just boost the two valve for less hassle, and really enjoy it
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Joined: Sep 2016
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How did this turn out were you able to finish the swap I have a 2001 I'm swapping a 2001 navigator 5.4 4 valve into my truck is a 5.4 2 valve I've already got both motors out and was going to wire up my harness to the 4 valve were you able to use the harness from the navigator or was it just too different
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Joined: Sep 2016
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If you able to assist email me more info mattdavison713@yahoo.com I could really use the assistance as I've done the same research on this and have only found that the coil packs are different polarities and have to be extended 4inches everything below the heads is the exact same and also would full length mustang headers fit once this is done