>>28441636
cutting J1 defaults the ecu to the onboard map that wasn't stored on the EEPROM slot for the s300. as long as you can solder then no big deal to try it. if your MPFI relay isn't clicking and your pump isn't priming then you have another issue. In case the MPFI relay does click, go into smanager and make sure fuel prime isn't disabled (0 seconds). As far as immobilizer goes, the s300 does have a security setting that you can make sure is disabled. The onboard immobilizer is in the ECU you swapped out for the p28 or p72 so that's no longer an issue. If the MPFI relay doesn't work you'll have to do some diagnosing. Try checking the MPFI fuse under the dash (fuse 31) isn't blown. Also check fuse 44 on passenger side strut tower in the bay. Since you've done a swap, make sure ALL plugs are seated completely. ECU wire jumpers are a very common failure point too. most are crap quality or outright pinned incorrectly. I gave you some things to check so good luck.