Took to Dealership - Royal Purple

nuts4nissan09 · 03-03-2010, 11:02 AM

I had a SES light come up a few months back. The tech had to talk to someone at the factory because he couldn't figure out why it was a code for a misfire. My car is a manual w/ sport package and no mods (just AMSOIL). He said only one other 370 has come in with this misfire and from what we could figure it was from tagging the rev limiter. It made sense because I do stretch her out from time to time. One thing I remember was that the idle settled @1,000 rpm with the SES light on and went back to its normal 650 rpm idle after the code was cleared. I've put about 1,500 miles on the car since the code was cleared and have been trying to shift right when I see the light come on. So far so good. I don't think Royal Purple would hurt your engines' top end, but if you want a synthetic with esters AMSOIL and Redline might be worth a look. BTW I have @ 11,000 miles on my Z.

normal · 03-03-2010, 11:20 AM

I have had the SES light come on four times since i got the car in Nov. The first was at 80 miles on the odometer, random misfire (P0300), and i just had it cleared thinking it was a fluke. The second time (80 miles later) took it into the dealer, they dismissed it saying it was working the "kinks" out of the system or something. Didnt really believe it, but thought maybe some fresh gas (the tank was full when i test drove it) would help. It was about 1500 miles later and came on again, the dealer did an idle air relearn procedure. Then about 400 miles later it came back on. This time they kept it for two days, and working with Nissan Tech support they replaced both MAF sensors. They had noted that it had been running rich, and this had taken care of that, and I believe that will actually solve the issue.

Everytime the light came on as a random misfire (P0300) and it was after the car had sat overnight or all day will I was at work (8+ hours) and came on during the initial startup. Only time will tell if this really takes care of it, I have about 400 miles on the car since the MAF sensors were replaced, but I feel more confident since they actually replaced something rather than just resetting the ECU, and that it took care of the running rich condition as well.

I dont know if something like that could trigger a specific cylinder misfire, although if it is related to the MAF sensors, they intakes would be a very easy scapegoat.

03-03-2010, 11:02 AM	#1 (permalink)
nuts4nissan09 Base Member Join Date: Aug 2009 Location: Washington,NC Posts: 39 Drives: 09 370Z PW Sport MT Rep Power: 16	Cylinder misfire I had a SES light come up a few months back. The tech had to talk to someone at the factory because he couldn't figure out why it was a code for a misfire. My car is a manual w/ sport package and no mods (just AMSOIL). He said only one other 370 has come in with this misfire and from what we could figure it was from tagging the rev limiter. It made sense because I do stretch her out from time to time. One thing I remember was that the idle settled @1,000 rpm with the SES light on and went back to its normal 650 rpm idle after the code was cleared. I've put about 1,500 miles on the car since the code was cleared and have been trying to shift right when I see the light come on. So far so good. I don't think Royal Purple would hurt your engines' top end, but if you want a synthetic with esters AMSOIL and Redline might be worth a look. BTW I have @ 11,000 miles on my Z.

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03-03-2010, 11:20 AM	#2 (permalink)
normal Base Member Join Date: Dec 2009 Location: UT Posts: 19 Drives: 14 Hyundai Santa Fe Rep Power: 16	I have had the SES light come on four times since i got the car in Nov. The first was at 80 miles on the odometer, random misfire (P0300), and i just had it cleared thinking it was a fluke. The second time (80 miles later) took it into the dealer, they dismissed it saying it was working the "kinks" out of the system or something. Didnt really believe it, but thought maybe some fresh gas (the tank was full when i test drove it) would help. It was about 1500 miles later and came on again, the dealer did an idle air relearn procedure. Then about 400 miles later it came back on. This time they kept it for two days, and working with Nissan Tech support they replaced both MAF sensors. They had noted that it had been running rich, and this had taken care of that, and I believe that will actually solve the issue. Everytime the light came on as a random misfire (P0300) and it was after the car had sat overnight or all day will I was at work (8+ hours) and came on during the initial startup. Only time will tell if this really takes care of it, I have about 400 miles on the car since the MAF sensors were replaced, but I feel more confident since they actually replaced something rather than just resetting the ECU, and that it took care of the running rich condition as well. I dont know if something like that could trigger a specific cylinder misfire, although if it is related to the MAF sensors, they intakes would be a very easy scapegoat.