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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.
Read the full discussion below to find out how to deal with the common issues.
4.6 to 5.4 Swap Notes
#62
Found a 2007-2008 5.4 3v Flex fuel motor with harness. So from what I under stand is all I would need to do is put this in and have my tune done? Also can also get the ECM for this motor.
Last edited by F-150truckman; 03-14-2010 at 12:45 PM.
#64
#66
JMC, after reading all the posts here I think your earlier assessment was correct. You should have just made the post and not answered any additional questions. You kinda dug yourself a hole with this one. But its a great informative subject and I have learned a bit here. I'm currently changing engines in a '98 Expedition from a 4.6 SOHC to a 4.6 DOHC and I find a lot of the info here is helpful. Thanks.
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#67
I'm switching from 4.6l to 5.4l s/c (L motor). If the exhaust manifolds are the same, just set at different angles, would I be able to use the manifolds off my 4.6l and have them match the exhaust at the correct angle?
#68
In case your unaware.
#70
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#74
Join Date: Dec 1997
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if you have an 02 4.6, so it has COP, and a 5.4 donor, can you just use the 5.4 harness and computer for the swap? I have a donor and i was hopin id just need to change things like the stall converter and other little things without the need to splice? will it drop right in?
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#75