Vacuum leak or O2 sensor maybe?Might be helping a buddy with his MK3 Supra project this weekend... 1J is running rich and seems to be slightly misfiring so we're going to try to diagnose. He's got new injectors, coils, and a fresh ECU but still not right. He's got a bead on a spare MAF sensor that we're gonna try but I can't think of anything else. Plugs are good, fuel pressure is good, turbo spools nicely, but still doesn't run smooth at idle. He's already emptied the tank and used fresh gas too...
Haven't driven the NSX in 2 years since my kid was born, but I'm hopefully spending 4th of July weekend getting it going! brake pads/rotors/fluid and oil change, to start.