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Old 10-06-2012, 06:40 PM   #1
jokers
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Default misfires

im getting a check engine light giving me all this
Diagnostic Trouble Code(s):
DTC MEMORIZED: P0301 MISFIRE CYLINDER 1
DTC MEMORIZED: P0302 MISFIRE CYLINDER 2
DTC MEMORIZED: P0303 MISFIRE CYLINDER 3
DTC MEMORIZED: P0304 MISFIRE CYLINDER 4
DTC MEMORIZED: P0000 PASS CODE (NO DTC DETECTED)

?????

car drives fine, in the process of tuning it
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Old 10-06-2012, 06:50 PM   #2
kendalja
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Good luck man I'm chasing down misfires as well!
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Old 10-06-2012, 07:12 PM   #3
kendalja
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What mods / year / model?
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Old 10-06-2012, 08:15 PM   #4
quazimoto
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It's because of the lightned flywheel. Read the FAQ's..............
http://forums.nasioc.com/forums/show....php?p=9878792
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Old 10-06-2012, 09:40 PM   #5
jokers
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Quote:
Originally Posted by quazimoto View Post
It's because of the lightned flywheel. Read the FAQ's..............
http://forums.nasioc.com/forums/show....php?p=9878792
good point, just wierd that ive had it for a long time and only now getting the check engine light
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Old 10-06-2012, 09:15 PM   #6
Groundup
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I told him that once already, hopefully he listens to you.
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Old 10-06-2012, 09:41 PM   #7
kendalja
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Jokers: how long have you had the lightweight flywheel in for? Everyone has been saying its mine as well but it's been in for 20k. Also what brand?
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Old 10-06-2012, 09:49 PM   #8
jokers
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act street
just weird cuz im etuning and it started popping up the light all of a sudden, before the tuning was fine
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Old 10-06-2012, 09:49 PM   #9
jokers
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im gonna be changing back to the stock flywheel though, hate the chattering etc
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Old 10-25-2012, 11:59 AM   #10
jokers
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i have changed back to the stock flywheel and have a lightened crank pulley

i still get the misfire codes?
my idle still dips and with the heavier flywheel it sure shakes heavy until it catches itself?

btw i have a hybrid build, it idles around 850-950
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Old 10-25-2012, 12:35 PM   #11
kendalja
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Get rid of that lightened pulley also!
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Old 10-25-2012, 10:02 PM   #12
jokers
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Quote:
Originally Posted by kendalja View Post
Get rid of that lightened pulley also!
looks like ill have to try that too
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Old 10-25-2012, 01:04 PM   #13
rocketperson7
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I'll trade pulleys if you want OP
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Old 10-25-2012, 03:15 PM   #14
CanadianImprezaSTi
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I know I post this in most misfire threads haha, but do you have your EGT Sensor still? If so do the resistor mod to it and report back. If it's on it's way out it can tell the ecu false misfiring.

Joel
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Old 10-25-2012, 10:52 PM   #15
rocketperson7
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Quote:
Originally Posted by rocketperson7 View Post
I'll trade pulleys if you want OP
but seriously..if you want/need to trade for a stocker, let me know
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Old 10-25-2012, 10:01 PM   #16
jokers
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ur talking about the sensor at the bottom of the downpipe? if yes no i do not i have my a/f sensor in place
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Old 10-27-2012, 11:46 PM   #17
CanadianImprezaSTi
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Quote:
Originally Posted by jokers View Post
ur talking about the sensor at the bottom of the downpipe? if yes no i do not i have my a/f sensor in place
No, I'm talking the one on the top of the uppipe.

Joel
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Old 10-28-2012, 12:24 PM   #18
jokers
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i dont have one on the uppipe, been deleted years now


Quote:
Originally Posted by CanadianImprezaSTi View Post
No, I'm talking the one on the top of the uppipe.

Joel
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Old 10-25-2012, 10:05 PM   #19
kendalja
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Anything that is lightened can cause misfires. As mentioned I would ditch the lightweight pulley. Did you replace the stock flywheel yourself? Was it hard?
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Old 10-26-2012, 09:36 AM   #20
jokers
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i have my stocker crank pulley

yea i changed it myself, i pulled the engine out, did some other things as well
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Old 10-27-2012, 01:42 PM   #21
dgriff992002
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Quote:
Originally Posted by kendalja
Anything that is lightened can cause misfires. As mentioned I would ditch the lightweight pulley. Did you replace the stock flywheel yourself? Was it hard?
I recently started having misfire issues in cyl 2 I've had thr perrin pulley for 4yrs never had an issue til now ... At wot it hesitates bad & get poor mpg
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Old 10-27-2012, 02:09 PM   #22
s0ber_p
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The lightweight items will cause a misfire in ALL cylinders, not just one. Likely you have a bad injector, coil or plug.

That being said, I have never seen a EJ engine have misfire issues from just a lightweight pulley. Flywheel sure, if it is super lightweight, but not only the pulley.
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