350Z (Z33) Forums Dedicated to 2003 + ZCars otherwize known as the Z33's

Oh no...

Old 06-19-2012, 10:11 AM
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Oh no...

That was my reaction after my Z started to run like complete garbage. A little background.. I own a 2003 Nissan 350Z enthusiast 6spd. Have had it for a couple years now and up until recently my car has been fantastic. But now, it goes through these.. modes, like it's bipolar or something.

It will start up nicely most of the time, but soon after it will snap into this mood where it's not firing on all cylinders or something. It will be running great "vroom vroom" and *snap* it sounds like "put put put put" and the idle is really rough. It will snap in and out of this.

From day 1, I thought fuel injectors. But i've taken it to two places now and neither of them could figure it out.

From what I gathered on forums/ the internet, I'm assuming it could be:
-ignition coils
-fuel injectors
-MAF sensor

I'm right around 125,000 miles and I just want to get her running smoothly all the time without these little hiccups. Any help would be awesome!
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Old 06-19-2012, 10:28 AM
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Welcome to ZDriver!

Has the check engine light ever come on?
Pulled the OBDII codes?
Pulled & read the spark plug tips? (If easily accessible).
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Old 06-19-2012, 10:30 AM
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P0300- Random/Multiple Cylinder Misfire Detected

that was the code

EDIT: the check engine light flashes on and off when it's snapped into weird mode. just stays on when running smooth. and thanks for the welcome!
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Old 06-19-2012, 10:45 AM
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I think this happened to my g35 awhile ago and I believe it was the MAF sensors
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Old 06-19-2012, 10:47 AM
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beautiful. I'm really hoping it's just the MAF sensor(s). thanks!
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