Random miss fire

[Sabian]

Hey I'm Steven Flips roommate>

OK ok I got a 2001 Altima GXE throwing a code of PO300. (Random miss fire) Only when I'm at a red light or when the car is warm and Idling my RPM's are dropping from 800 rpm's to 500 and below. Very erratic idling!! I've replaced the distributer only 3 years old. Replaced wires, spark plugs, and gas cap. Still don't know what going on. My check engine light was on but after the wires and spark plugs were changed the light went off......Help anyone, could be the injectors but how do I find out. I've looked for a vacuum leak and theres non to be found. Any ideas?????

[Zippy69]

Most likely and air metering problem. Your ecu may be getting some strange readings and trying to compensate with timing and fuel. Things to check are air metering system, ignition, O2 sensor.
Good luck. Is Sabian anything like sybian?

[JTA021]

your flips roommate and your just now on the site? wow

[Sabian]

Most likely and air metering problem. Your ecu may be getting some strange readings and trying to compensate with timing and fuel. Things to check are air metering system, ignition, O2 sensor.
Good luck. Is Sabian anything like sybian?


I've also replaced the Mass airflow already the same time I replace the distributer. It could be a air metering problem. How would I test that? My O2 sensors I got tested the same day of my Cat. being replaced.


Could it be my timing?

[Dominic49]

check your fuel preasure regulator