rav said:
here you go, hope it helps:
Lunghd stayed with the carb'd set-up from the XJ, and just bolted it onto the 3.4 instead of fiddling with the FI.
So that write-up won't help on the FI issue, tho it's great for the mechanics of the swap.
One thing occurs to me regarding FI:
The 'puter and wiring harness and sensors will communicate together.
But I think you'll have to run a duplicate set of sensors to operate the gauges. Maybe a 'T' fitting at the temp port and install two sensors.
You'll also have to fiddle with the power out of the ignition, since the 2.8's 'engine circuit' only feeds the ignition.
Now you'll have to feed the ignition, computer, and fuel pump; possible others.
Maybe take the existing ignition lead and feed a couple of relays to then feed the new set-up.
FI cars of the '80's-early '90's were OBD, with codes that you accessed by various means.
Chryco = turn the key three times, then count flashes of the 'engine warning' light.
GM = jump the two sockets of the OBD connector 2-pin connector, then count flashes.
Modern engines (since '96) are OBDII; can't read yourself, but Checker/AutoZone/PepBoys have readers for free use.
THE MID-90'S GM's had 'OBD1.5' with a three-pin connector that can't be jumpered like earlier GM's, yet nobody but GM dealers have the goofy old reader. So, trouble-shooting engine-management issues could be a bitch if you get the OBD1.5 system.
There's an outfit that makes custom wiring harnesses for engine swaps.
http://www.injectiontechnology.com
Quite expensive ($400-$900), but possibly cheaper than a junkyard harness in the long run if it's plug-n-play.
Good luck.
-Rick