Nissan MP1F2A25LV, P1F2-9H0249
Called out to customer location for a engine stalling issue. Arrived at customer location and spoke with the customer. Customer states he has been having runnability issues for a months. Another company prior to me, went out and rebuilt the nikki regulator. He was called back out for same issue a month later. The tech replaced the injector holder. Then 3 weeks later I was called. Inspected and found the fuel pressure sensor unplugged. There was an extra sensor plugged into the harness and was just hanging beside the injector holder. The unit runs like this for a minute then stalls. Let sit for 10 min and cranks and runs all day. I unplugged the extra sensor and plugged the harness connector back into the sensor mounted in the holder. The engine now barely runs and stalls when throttle is applied. Checked fuel pressure at regulator check port. I have 5 psi constant and holds when key is turned off. I have no codes popping up except for the E-36 when I unplugged the fuel pressure sensor with the ignition on. I don't understand how the engine runs better with a fuel pressure sensor not reading any pressure. This one has me stumped. Please help!