02 Specv random misfire*HELP

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JesterJess
Posts: 4
Joined: Fri Nov 27, 2015 5:03 pm
Car: 2002 Sentrs SER Spec V

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2002 Specv 2.5, 210k miles.
Car is randomly dropping a cylinder, sometimes it feels like two. Its more likely to happen when the car is still warming up...and also when its cold outside, anything under 50F makes it occur more often. Sometimes it doesnt occur for days.
The car will stop firing on a cylinder, sometimes for two or three seconds, sometimes for ten minutes. During the extended occurrences the check engine flashes, and it throws a random cylinder misfire code.
Sometimes I can remedy it by reving it in neutral, and as the RPMs fall off, it will smooth out and run normal. Also noticed idle RPM is randomly hanging at 1200-1600 for a little too long when driving in traffic.
Thinking MAF as believe it or not, its the original. Is there a way to test them with a multi meter?
Im running a CAI (new filter), header, and 2J side dump exhaust.
Any help is appreciated!

**Car is not consuming oil or coolant,
**Plugs have about 30K on them


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the converted
Posts: 2767
Joined: Wed Feb 21, 2007 7:14 am
Car: '99 BMW M3 6.0
'88 Toyota Celica All-Trac (somewhere in Cali)
'20 Toyota Tacoma
Location: Boston

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My Maxima used to have this issue in colder weather while it was warming up. Turned out that I had a few flaky coils that weren't sparking as well as they should have been.

SoundEfx
Posts: 263
Joined: Thu Oct 16, 2014 3:54 pm

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You could check out the fsm and see what voltages the maf and other sensors should be seeing and test them out.
If they are getting the right voltage, then the sensor might be going bad.

davismorris
Posts: 1
Joined: Fri Dec 04, 2015 10:43 pm
Car: BMW
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Facing Same Problem in cold weather.!

JesterJess
Posts: 4
Joined: Fri Nov 27, 2015 5:03 pm
Car: 2002 Sentrs SER Spec V

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Couple weeks now and no issues. Replaced the coils, seems to have been my issue.

SoundEfx
Posts: 263
Joined: Thu Oct 16, 2014 3:54 pm

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Glad you got it resolved.


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