Check the fuel rail and front cover.
On my truck it was used the one out of the Disco I and not the one on the Rangie.
Use the ECU out of your D90. The Ragies ECU have something different. Carlos explained it to me 3 years ago and now I don't remember what it was. (I'm getting old).
. It was something with the alarm.
Originally Posted by jafir
I believe MOST gems computers have a fuel map for 4.0 and 4.6, and you can just switch it if you have access to the appropriate computer.
You need AutoLogic or similar to do this. I've done it on all my DI's.
Some folks debate that doesn't work. There are a few threads about it.