engine swap 2.8 to 3.1

[gcisuzu]

Hey just wondering if any one can help i have put a 3.1 from a 2000 mu into my 2.8 92 mu just wondering if there are any wiring gremlins i need to be aware of cheers

[geeves]

3.1 from a 2000 mu?????
If there are any gen3 Mus in Australia they will have the 3.0 4jx1 which is not really a motor to put in a early mu

[gcisuzu]

Sorry its a 4jg2

[geeves]

It wont be a 2000 then. Can you post a pic of the car and the build plate

[gcisuzu]

Nah sorry car was a roll over I pulled the motor box and diffs and put it all into my 92

[geeves]

Ok we forget the year of the donor truck
There are 2 versions of 4jg2 that it might be. First up to about 96 is all mechanical and should pretty much bolt in. You will have an exhaust issue if you dont have the dump pipe with the engine and the gearboxes have different rear drive outputs and rear driveshafts because of this. Otherwise as easy as any other motor swap
From 96 the injector pump was electronically controlled. This is identifiable by a box on the back of the injector pump your 4jb1 doesnt have and the lack of throttle cable. If you dont have the ecu and loom you will have substantial issues. Hunting down an earlier pump will be the easiest fix