Welcome to the North American Subaru Impreza Owners Club Tuesday September 23, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 08-24-2004, 12:22 AM   #1
snowmachine
Scooby Newbie
 
Member#: 68661
Join Date: Aug 2004
Question help, still misfiring

Hey, I got two cylinders misfiring, 1 and 2. They both run off the same ignition coil, (there is no distributor or cap). I changed the plugs and checked the wires and no dice. Autozone guy recommended the fuel filter, but I don't know where it is on this car. Thanks everyone

98 Impreza outback, 2.2L naturally aspirated
* Registered users of the site do not see these ads.
snowmachine is offline   Reply With Quote
Old 08-24-2004, 01:42 AM   #2
Chi_San
Scooby Guru
 
Member#: 53558
Join Date: Jan 2004
Chapter/Region: NWIC
Location: Deadford, OR
Vehicle:
2002 WRX Wagon
Silver

Default

If they're both running off the same coil...
Chi_San is offline   Reply With Quote
Old 08-24-2004, 08:01 AM   #3
JonofScio
Scooby Newbie
 
Member#: 53595
Join Date: Jan 2004
Chapter/Region: NWIC
Location: nowehres
Vehicle:
1987 GL Hatch
EA81 1.6L + Weber

Default

well, through all of my fun experiences, i've followed misfiring down to a couple items...

ECU, very unlikely, but your ecu does all the timing and could be messed up.
Coil, could not be working properly
valves, could not be adjusted right
spark plugs, could be fouled/corroded
spark plug wires, could be old and not producing enough current/voltage
heads, could be warped

hope this helps some. sounds like your coil pack to me. 1&2 share the same connection and 3&4 share the same connection, so maybe half of your coil pack is dying.

Last edited by JonofScio; 08-24-2004 at 08:17 AM.
JonofScio is offline   Reply With Quote
Old 08-24-2004, 09:25 PM   #4
jamesonc
Scooby Newbie
 
Member#: 49629
Join Date: Dec 2003
Chapter/Region: NESIC
Location: Southern Maine
Vehicle:
'87 Dodge Ram 50
Black

Default

you are running 87 octane correct
jamesonc is offline   Reply With Quote
Old 08-24-2004, 11:52 PM   #5
snowmachine
Scooby Newbie
 
Member#: 68661
Join Date: Aug 2004
Default

I am or have been running regular unleaded. I just checked the ignition coil and wires using a wire to the block test and there is good spark. Got new NGK plugs all around. How do I check the fuel filter? Where is the fuel filter? I have heard that could be the issue, but if it is, then why just cylinder 1 and 2? ARRRGHHH!
snowmachine is offline   Reply With Quote
Old 08-25-2004, 12:30 AM   #6
snowmachine
Scooby Newbie
 
Member#: 68661
Join Date: Aug 2004
Default fuel filter cause misfirings??

I have heard a bit that the fuel filter may be to blame for misfires. Where is the filter located and how can I check it? Thanks. oh yeah, the coil pack is going tommorow in hopes that that will fix the problem.
snowmachine is offline   Reply With Quote
Old 08-25-2004, 08:56 AM   #7
craigz
Scooby Newbie
 
Member#: 62819
Join Date: May 2004
Chapter/Region: MWSOC
Location: Ann Arbor, MI
Vehicle:
2002 Outback
Blue/Titanium

Default

Don't know about any other engine than the 2.5, but the fuel filter is harnessed right to the driver's side strut tower on my '02 OBW. It has two hoses "plugged" into two curved spouts on the top of the filter. Just pull back on the harness release, slide the hoses off (fuel may leak a little) and reverse that order with the new filter. When you start the car, turn the key to the run position and wait a second for the fuel pump to get the pressure up. It still may not start right on the first try, but that'll give it the best chance. Obviously, the fuel that may leak will be missing from the fuel line at the first start. Sorry if this is a DUHHHH!
craigz is offline   Reply With Quote
Old 08-25-2004, 11:25 AM   #8
Subie Gal
GC84Ever
Super Moderator
 
Member#: 301
Join Date: Sep 1999
Chapter/Region: NWIC
Location: WA
Vehicle:
1970 FF-1 & '70 Van
02 WRX/01 RS

Default

do you have a check engine light?

have you had the code pulled?

what makes you think it's the fuel filter?
Subie Gal is offline   Reply With Quote
Old 08-25-2004, 01:38 PM   #9
snowmachine
Scooby Newbie
 
Member#: 68661
Join Date: Aug 2004
Default

Autozone pulled my codes and I had a misfore on cylinder 1 and 2. p0301 p0302 or somethin like that. The Autozone guy said check fuel filter. But then shouldn't it affect all four? just the 1 and 2 makes me think coil pack, but what do I know... thanks for the help guys
snowmachine is offline   Reply With Quote
Old 08-25-2004, 02:24 PM   #10
RockRaceScooby
Scooby Newbie
 
Member#: 57120
Join Date: Mar 2004
Location: Colorado Springs, CO
Vehicle:
1999 Forester
Red

Default

Why don't you pull one of the plug wires, jam a spark plug on it, hold the body to ground, fire up the car and see if you have spark. Don't shock yourself.
RockRaceScooby is offline   Reply With Quote
Old 08-25-2004, 04:56 PM   #11
Subie Gal
GC84Ever
Super Moderator
 
Member#: 301
Join Date: Sep 1999
Chapter/Region: NWIC
Location: WA
Vehicle:
1970 FF-1 & '70 Van
02 WRX/01 RS

Default

autozone guy doesnt know what he's talking about.
mis fire codes are tricky to chase down -
and likely have zilch to do with your fuel filter...

could be the obvious... coil, spark plug or wire

could be ecu
could be fuel injector
could be wiring harness issue

if it's not the obvious, maybe it's time to have a Subaru Tech take a look at it.

Jamie
www.subiegal.com
Subie Gal is offline   Reply With Quote
Old 08-25-2004, 11:34 PM   #12
snowmachine
Scooby Newbie
 
Member#: 68661
Join Date: Aug 2004
Default

well, I put a new coil pack on today, no dice. CEL still on, I may drive it to work tommorow and put some higher octane fuel in, other than that, I guess it's time to suck it up and take it in. Fuel filter just doesn't sound right to me, cause it would affect all four cylinders. Thanks for the help folks.
snowmachine is offline   Reply With Quote
Old 08-26-2004, 01:18 AM   #13
Chi_San
Scooby Guru
 
Member#: 53558
Join Date: Jan 2004
Chapter/Region: NWIC
Location: Deadford, OR
Vehicle:
2002 WRX Wagon
Silver

Default

Does your car ever knock? Did it Knock before? If so, it might actually be worth checking the filter. If the fuel leaving the filter is dirtier than the fuel entering the filter, then you might have injector problems. That's how a bad filter can mean misfire.

Also might help to check the intake, all of it. Take the intake manifold off if you can. No sense taking it in to a tech to find that there was something stuck in your intake.
Chi_San is offline   Reply With Quote
Old 08-26-2004, 10:46 AM   #14
sixpack subaru
*** Banned ***
 
Member#: 64974
Join Date: Jun 2004
Location: My Shed, Melbourne, Australia
Vehicle:
1995 WRX,APEXi,HKS,$
Faded, Stonechipped Red

Default

STICK TO THE BASICS!!!
have you tried swapping HT leads, (Ign Leads/Coil Leads/Plug Leads), from the two faulty Cyl's???

You guys are trippin'...HARD!!
From what I can gather, it is a DDIS, (Double Direct Ignition System?),
In which case, the 'Second' or 'Return' Spark runs to the opposite Cylinder on the Exhaust Stroke, (cheap way of eliminating Unburnt Hydrocarbons).
I do not believe at ALL that it could Possibly be a fuel supply fault!!!
THINK ABOUT IT!!! The only way a 'spark' can traverse from one cyl to another is by
being triggered at the wrong time, or by being sent to the wrong place!!
I'm sorry to YELL.
But if you're not sure, (or simply DON'T KNOW), don't fill the guy's head full of CR*P),
it doesn't do anyone any favours!!!

Tell me more about the Ign system on your vehicle, as I am based in Australia and can only speculate.
However, if it IS DDIS, I am assuming it has a built in Igniter??
I once had a H6 (3.0R) that ran rough intermittantly on ONE cyl!(5).
Occasional Fault Code, no other info.......according to Factory Diagnostics...
Turns out, (after much 'Back-probing' etc), that it was the 'YAW/Veh Direction Sensor under Centre Console that was throwing incorrect Voltage/info to the VDC,(Veh Dynamic Control), Unit and making the ECU 'Think'that it had lost traction!!
The result was an occasional 'Dead Spark' to No:5 Cyl.
I DO NOT believe your fault is THAT hard to find!!LOL

Cheers!

Sixpack Subaru
sixpack subaru is offline   Reply With Quote
Old 08-26-2004, 01:00 PM   #15
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

you probably need wires and plugs.....check the coil tower for any kind of arcing marks, if you see any, replace the coil as well, fuel filter won't cause misfires

if you had an injector dieing i think you'd see a miss on one cylinder but it'd be noticeable, you are probably getting cold start warm up misfire codes which seems to be common as the plugs/wires/coil start to act up
HndaTch627 is offline   Reply With Quote
Old 08-25-2005, 06:21 PM   #16
Subietonic
Scooby Specialist
 
Member#: 12588
Join Date: Nov 2001
Chapter/Region: SCIC
Location: Down by the sea
Vehicle:
Four Count 'em
GF5,BDA,BD5, BP5

Default

Did you have any carbon buildup on the old coilpack...looks like corrosion usually black sometimes saltish/white looking? If you do then your plug, plug wire or coil pack is failing. Usually starts with a fouled plug and then progesses to its plug wire that cannot discharge all the juice through the fouled plug so then the wire starts to fail. Once the wire is failing regularly, then the coilpack has nowhere to send its jolt via that plug wire so it starts to breakdown - very typical, progressive process unless you nip it in the bud early.

If this were not the 2.2L (which IMHO and experience is dam near bullet proof), I'd suggest that a head gasket has been compromised and is causing a misfire code in that cylinder (again my experience with an open deck 2.5L DOHC). But that would only be after I had checked the previous three things mentioned above and I would still doubt the HG on a 2.2L unless the engine has been run coolant dry or low, low, low on oil for a while.

Also a Suburu procedure/check for coil pack issues... http://endwrench.com/images/pdfs/IgnitionCoil.pdf

I'd start with the plugs and work my way backwards to the coilpack... somewhere in there, most likely, is your answer.

Good luck and keep us informed on your progress.

Dale
Subietonic is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
EJ22 Still misfires badly Zac86 Normally Aspirated Powertrain 30 03-11-2013 08:47 PM
Still Misfiring on all cylinders?! crazycanasian Factory 2.0L Turbo Powertrain 16 08-16-2009 03:33 AM
cylinder 3 and 4 still misfire joshua olean Factory 2.0L Turbo Powertrain 18 01-24-2008 07:24 AM
Still misfiring...HELP! Mr. Bungle Factory 2.5L Turbo Powertrain 20 08-05-2005 12:01 PM
Help! car misfiring! Qaveboy Subaru Conversions 0 05-07-2004 07:56 PM


All times are GMT -4. The time now is 01:34 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.