Hi I'm joel im new here got my first lexus couple days ago its a 93 sc400 starts and runs. But after it heats up acts like a misfire young man I bought it off of said its a ecu went to go scan it. Just to be sure and im not getting power to the obd1 port to scan it plz help

 

Welcome. Check fuses in kick panel with a voltmeter to ensure they are all good and see if you get port power back.