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Old 03-26-2011, 05:46 AM   #1
silverongold
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Default please help with misfire!!!!!!

so i am getting a misfire for all four cylinders. it occurs shortly after boost comes on, runs rough and robs power.
i have:
used fuel system cleaner.
replaced plugs.
gapped plugs down.
new fuel filter.
logged and found nothing out of the norm other than it pulls timing as it misses.
checked coil packs for cracks or any visual damage.

i am having a way frustrating time trying to figure this one out and really do not want to take it some where to be checked out cause i have no funds for it at the moment. if you have had this problem or have some advice please help me thanks.
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Old 03-26-2011, 06:37 AM   #2
801_STi
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air leaks / tune
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Old 03-26-2011, 12:28 PM   #3
BuGS
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Quote:
Originally Posted by 801_STi
air leaks / tune
With this ^. Check the hose after the maf and under the IC
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Old 03-26-2011, 01:30 PM   #4
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diff check maf that mf is always ****in **** up
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Old 03-26-2011, 01:31 PM   #5
WRX N EFX
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Jordan didn't you get the memo? having a misfire that is hard to track down is the new cool thing.
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Old 03-26-2011, 01:37 PM   #6
silverongold
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f you brandon
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Old 03-26-2011, 01:42 PM   #7
WRX N EFX
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^^whats this guy think hes captain knots, thinks hes captain tying knots? whenever someone needs some knots tied they go to him... Bulls**t!!!

Last edited by WRX N EFX; 03-26-2011 at 02:11 PM.
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Old 03-26-2011, 02:18 PM   #8
silverongold
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ha ha
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Old 03-02-2012, 04:51 PM   #9
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Quote:
Originally Posted by Frag View Post
diff check maf that mf is always ****in **** up
How do you check this?
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Old 03-02-2012, 04:58 PM   #10
silverongold
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Sorry to resurrect this thread, but I need a little help....... again. I replaced all four coilpacks and the misfire went away!! it was retarded expensive but a relief to have figured it out.
Since when i drive it i will throw a miss fire code usually wen idling or slowing down for a red light. (the check engine light will flash a few times and the stay on)
recently I have moved and made a descent change in elevation. (just got a wide band today, finally to check up on this)
last night i thought i noticed a little miss but no flashing light, i think this was just under light load in the rpms.
later in the night i was under a descent load probably around 4-5k rpms and the motor cut hard and then came back in. it felt like a pretty hard miss or some thing.
I have not checked the code. I unplugged bat to reset and start over so i can check that as soon as it happens again when i drive it with the wide band in.

Any clues for me of what to look into now considering the first post on this thread of the things i already tried?
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Old 03-02-2012, 07:06 PM   #11
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Could be a couple of things.

MAF, (like everyone is saying)
Tumblers, are gummed up, so the butterfly valves are not opening in time....or not opening all the way....
Boost Spike
Bad injector
Dirty Cam sensor
Dirty Crank sensor
Timing belt could of skipped a tooth. minimum of 3 before it sends a valve into a piston
Compressor bypass valve getting stuck.

Can you provide Data logs? Fuel trims, Timing, Boost, FBKC the works?

Last edited by TurboJunkie85; 03-02-2012 at 08:08 PM.
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Old 03-02-2012, 10:29 PM   #12
Eww Evo
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^ I would check what he said. Also fuel pump, spark plugs dadada
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Old 03-03-2012, 05:58 AM   #13
silverongold
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Soo I checked the code today. All four miss at low rom like 2k.
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Old 03-03-2012, 06:34 AM   #14
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What codes logged? U have acess to a decent scan tool or scope?
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Old 03-03-2012, 11:51 AM   #15
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JORDAN! stop breaking ****!
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Old 03-03-2012, 12:21 PM   #16
silverongold
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Quote:
Originally Posted by toddguy
JORDAN! stop breaking ****!
I know!!!!!!!
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Old 03-03-2012, 12:23 PM   #17
silverongold
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Quote:
Originally Posted by boosted03subie
What codes logged? U have acess to a decent scan tool or scope?
Well I used an auto zone one and it's a miss in all cylinders. Freez data rpms where around 2xxx.
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Old 03-03-2012, 12:49 PM   #18
907Bum
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Could still be just about anything, not enough data to trouble shoot it down over the interwebs. Suggest methodically going through everything one step at a time to start ruling things out.
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Old 03-03-2012, 10:13 PM   #19
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All four misfire uh? Fuel filter or fuel pressure regulator on the passenger side fuel rail.
Check the wiring harness for the injectors/coilpacks drivers side under behind the battery

I would seriously check the timing belt.
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Old 03-04-2012, 02:45 AM   #20
rallymobile
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To misfire on all cylinders if going to a bad sensor or incorrect voltage reading of some kind. I suggest checking for knock counts and check your grounds. A bad injector or plugs will throw a code for one misfire and/or random multiple misfire. The computer is recognizing that all cylinders are running poorly and I assume that will be traced down to one simple problem. Very possibly a ground, computer or fuel pump. That's my $0.02, and I hope it helps. If you post your mods, then that could help for suggestions.
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Old 03-04-2012, 03:24 AM   #21
boosted03subie
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So what was the pid code? (P.....) And where their other pending pids?, autozone readers are junk and dont tell you crap. If you can get me the make, yr model, and pending or logged codes, I can give you the trble shooter along with test procedures and commin problem tips from my data base,
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Old 03-08-2012, 05:42 PM   #22
silverongold
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Quote:
Originally Posted by boosted03subie
So what was the pid code? (P.....) And where their other pending pids?, autozone readers are junk and dont tell you crap. If you can get me the make, yr model, and pending or logged codes, I can give you the trble shooter along with test procedures and commin problem tips from my data base,
Sick!!
Codes p0301-p0304
All with pending codes of he same numbers
What's logged codes?
2002wrx
Thank you!
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Old 03-08-2012, 05:47 PM   #23
silverongold
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Quote:
Originally Posted by rallymobile
To misfire on all cylinders if going to a bad sensor or incorrect voltage reading of some kind. I suggest checking for knock counts and check your grounds. A bad injector or plugs will throw a code for one misfire and/or random multiple misfire. The computer is recognizing that all cylinders are running poorly and I assume that will be traced down to one simple problem. Very possibly a ground, computer or fuel pump. That's my $0.02, and I hope it helps. If you post your mods, then that could help for suggestions.
Thanks for the ideas i am checking some today ! A lot of these commin suggestions have been checked as listed in first post and replaced just in case for example fuel pres reg and filter.
Please keep following this for input man!

What's the best way to check
Computer?
Low volts ( I have a small oddesy batt, so maybe this is a prob)?
Grounds?
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Old 03-08-2012, 05:51 PM   #24
silverongold
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Quote:
Originally Posted by TurboJunkie85
All four misfire uh? Fuel filter or fuel pressure regulator on the passenger side fuel rail.
Check the wiring harness for the injectors/coilpacks drivers side under behind the battery

I would seriously check the timing belt.
New packs installed and that fixed it just a bit ago when I first created this thread. It was a lot more violent of a stutter and miss back then though.
Timing belt is a pe Kevlar belt
Roger Clark cam gears and all new tensioner stuff
Maybe 700 miles ago
I did have this checked by a shop as well
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Old 03-08-2012, 05:55 PM   #25
silverongold
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Sorry I thought the first post said more than it did!
New
Fuel filter
Plugs
Pressure reg and test
Timing belt checked
Afrs are ok a tad on the rich under boost 10.5 on e85
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