The computer is set to the 5.4. Not much difference except some fuel control issues. I would try it to see how it runs before getting a new computer.
July, 17, 2012 AT 3:28 AM
I already place the engine in and its runs good but it has a stall to it and it smokes real bad and I was wondering would that computer make it smoke
July, 17, 2012 AT 1:20 PM
If it is giving a rich command, yes. The 5.4 requires different fuel settings and that may be making it run rich or it may be an issue from the other motor as well.
Get a shop to monitor the computer trims and tell you what is happening
July, 17, 2012 AT 3:33 PM
Can I use the computer out of the car that the motor came out of instead of going thru trying too drive it too a shop
July, 17, 2012 AT 3:35 PM
No, the vin is burned into the computer and if you use that one, it most likely will not run from a vin mis match. You may be able to have the current one flashed by the dealer. Call a dealer service department and see what they say
July, 17, 2012 AT 3:46 PM
I spoke with a mechanic at the ford dealership and he said he couldnt flash the computer over to a 4.6, he told me too just get a 4.6 computer to put in there, how do that sound?
July, 17, 2012 AT 4:49 PM
Not right if he means a used one. The computers are the same, they just need different information
July, 17, 2012 AT 10:33 PM
Well I did get a 4.6 computer and the truck started up and shut off and when I try too start it up it wont stay running
July, 17, 2012 AT 10:36 PM
I have installed a computer and a mustang before and it done the samething and when I went back too it the next day it ran perfect do you think I need too give it time to reprogram?
July, 18, 2012 AT 3:43 PM
It does not reprogram itself. They have to be flashed.
It sounds like a security issue. Did yours or the donor have a security light?