Im at a cross roads on my 1999 f250, i am having top end problems so im trying to explore my opions to upgrade the heads or do a complet 4v swap? I'm really interested at doing a 4v swap but im having a hard time finding information on anyone doing it in the trucks. HELP PLEASE!!!

 

Do you mean 3v swap and if it is use the search button. This has been asked before. Read those threads then what you have question about someone will chime in.

 

No, I'm pretty sure he's asking about the 4V Navigator engine.
It's a doable swap,and MUCH easier than the 3V. The 2V PCM will control the 4V engine no problem(just needs a custom tune), and most everything will just drop right in with minimal fuss.
JL

 

So all i need is a complete 4V Navigator engine, just drop it in and get it in and get a custom tune? What years of the Navigator do i need to be looking for?

 

It's not just that simple, and there are things that will need to be done other than just "dropping it in", but that pretty much sums it up.
You'll need a '99-'03 4V 5.4L.
JL

 

What else need to be done? Is my mpg gonna stay about the same or go up?

 

I tryed looking up some info but all the info i can find are 4v swaps n mustangs

 

I didn't have time to look it up on the F150 forum but I had considered a 4.6 4v swap in my '99 F150. The advice I recall regarded the difference in Romeo and Windsor engines; you should check the VIN to get the same manufacturer to avoid changing the flex plate. The other issue was the PCM; consider getting the 4v PCM or a tuner (check with the tuner manufacturer to make sure things will work) and don't beat on it too much until you address the 2v PCM issue.

Best of luck,

 

Overlook the snippy comments in #2 this F150 forum thread clicky here but you'll get a better idea of what may be involved.

 

Sorry Johnlwlr didn't realize there was a 4v engine learned something new. Hope you get the info your after.