2000 Ford Expedition Repair Question
I did a 5.4 to 4.6 swap would i have too change the computer also?
Asked by damien12Answer
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.
Roy
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
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
Roy
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
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
Roy
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?
not right if he means a used one. the computers are the same, they just need different information
Roy
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
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?
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??
Roy