last night I was switching out fuel pressure regulators to test if that was the cause of my car not holding fuel pressure after shut off. I let the car run then crawled under the rear of the car and unplugged the fuel pump harness that connects to the hotwire kit to bleed off the pressure. I switched out fuel pressure regulators then proceeded to the gas station. When I got back into my car I noticed the low volt light was on and my volts were 11.5-11.9 at idle. With the car off, battery and back of alternator reads 12.4. I tested the brown wire plug with key on and have 12 volts. I even jumped 12 volts from the wastegate solenoid to the alternator and still when it fires up, my volts go to mid 11s. Can I assume it's the alternator because the exciter wire has 12 volts plus I tried bypassing and it still didn't help? Just weird that this happened the minute I touched something ( fuel pressure regulator and fuel pump harness).