View Full Version : check engine light... still... *UPDATE 7/14/05*
strat81
03-14-2006, 09:38 PM
my car has been having this on and off problem where i will be cruising along and all of a sudden it will seem like one of the cylinders stops firing. i pull over, shut the car off, let it sit for a few, and then fire it back up and it runs fine again.
it did it to me today so i dropped over to an autozone and had them scan the codes for me. i had 2 codes... a misfire in the #2 cylinder and an 02 sensor malfunction (which i'm assuming was caused by the misfire)
so my first question is... which cylinder as i'm looking at the motor is the #2. next, any ideas on what would be causing this. i'm thinking plugs and wires but it seems weird that it's an occasional occurence. i would think that if it was a plug/wire that i would have this problem often or constantly. coil pack? ecu? what do you guys think?
Wiscon_Mark
03-14-2006, 09:47 PM
3 4
1 2
(front of car)
I believe that's the pattern.
Sounds like a plug wire (or plug) is loose, or you're experiencing coilpack failure. Also check the injectors and how tight in there they are.
Best way to troubleshoot coil pack is to switch the 2 and 4 wires around and see which one misfires.
legacy92ej22t
03-14-2006, 09:50 PM
When looking at the motor from in font of the car, #2 is the closest one on the driver side.
3-4
1-2
radiator
^^like that.
It could still be plug wires and plugs and be random. It could also be the coil pack. Have you done a tune up since you got the car?
Wiscon_Mark
03-14-2006, 09:51 PM
whoops, I had it backwards (editing)
gil_ong81
03-14-2006, 09:59 PM
my personal bad experience.
http://forums.nasioc.com/forums/showthread.php?t=857852
instructions on testing your coil pack in post #6.
Superu264
03-14-2006, 10:11 PM
I was having the same problem a couple months back. New coil pack and not a problem since. ::knocks on wood::
legacy92ej22t
03-14-2006, 10:15 PM
I have an extra coil pack you can try swapping in for while, if you want Spencer. It'd help you troubleshoot.
strat81
03-15-2006, 01:11 AM
matt... no tune up yet... plugs and wires are on the to-do list along with timing belt, front seals, oil change, tranny fluid change, diff fluid change, etc...
i'll have to test the coil pack to see if that's the problem. will it be registering if the car isn't misfiring though?
Wiscon_Mark
03-15-2006, 08:06 AM
if there is a definite problem, a resistance test will show it.
galek_98gt
03-15-2006, 09:13 AM
i had this problem a couple weeks ago after driving it really hard. it turned out to be a corroded connector on the plug wire to the coil pack. took a wire brush, cleaned it and the put some dielectric grease on it and its been fine since.
belladonna
04-03-2006, 09:15 PM
ohm tested the coil pack and it checks out ok...
what resistance should the plug wires be at? i'd like to test the one running to the misfiring cylinder and possibly grab a replacement at the junkyard. (i'm too broke to buy a new set of wires at the moment)
any help would be appreciated.
(this is spencer btw...)
gil_ong81
04-03-2006, 10:05 PM
Spencer. i reckon a cheap and easy way of checking would be to just test all 4. the 6 inches between the longest and shortest should not matter that much.
I might be able to test mine too (for comparison) tomorrow if the weather is not too terrible.
ivwarrior
04-03-2006, 11:18 PM
^^^^ What he said. They should all be fairly close to the same. I forget the spec, so this could be wrong, but for some reason 5k ohms per foot is coming to mind? It's been a while since I had anything with the spec in front of me, so that's foggy memory. Like we said though, they should all be relatively the same.
tecnica technician
04-04-2006, 03:09 PM
just had a guy asking about this same problem on nasioc Ill tell you what I told him becaus I had a simmler problem. first check wires and plugs if that check out check then it might be the gas you put in it if you got some bad gas that could have done it lastly if the fule filter has been changed it could do it as well so Ive heard don't know about the o2 that never hapened to me just has 1 and 3 mis fire
Huffer
04-04-2006, 03:13 PM
Run down to the local Autozone and grab the Haynes manual. $16 and it has all the factory specs in it.
strat81
05-05-2006, 02:35 PM
replaced plugs and wires, ohm tested the coil pack and it checked out ok... also, if i pull one plug wire at a time, each wire is sparking...
any thoughts?
Wiscon_Mark
05-05-2006, 07:29 PM
so it's still going on?
hmmm
strat81
05-05-2006, 10:55 PM
yea... i'm not totally crossing out the possibility that it might be the coil pack but i'd assume that it would be showing misfires on 2 cylinders since the half the coil pack part fires two of the four cylinders.
i'm thinking bad injector... anybody have the ohm testing info on those? mainly just what resistance they should be putting out so i can hit them with a multimeter and see if that's the problem.
legacy92ej22t
05-05-2006, 11:08 PM
Have you pulled your codes? It would probably tell you exactly what's wrong.
strat81
05-06-2006, 06:46 AM
had the codes pulled back when it first started doing it...
i had 2 codes... a misfire in the #2 cylinder and an 02 sensor malfunction (which i'm assuming was caused by the misfire)
legacy92ej22t
05-06-2006, 08:48 AM
Oh yeah, woops. :oops:
Hmmm, it could be an injector but IIRC a bad injector will actually throw it's own code, at least in theory.
strat81
05-08-2006, 02:07 AM
so nobody has any idea??
:?
legacy92ej22t
05-08-2006, 07:48 AM
When you are checking your parts and for spark ect.., are you waiting until you have the problem and then pulling over and testing on the spot while it's ocurring? Or are you testing things when the problem isn't present? If it's an intermitting problem it will most likely only test bad while the problem is happening.
galek_98gt
05-08-2006, 09:39 AM
my CEL is back on with cylinders 2&4 misfiring. looks like i may need to look at the coil pack but i'm hoping its just bad carbon buildup on the plugs that can be cleaned off. heres to having it be a cheap fix.
strat81
05-08-2006, 10:23 AM
it's never doing it when we go to test it... wouldn't i be getting 2 miofire codes though if it was the coil pack?
legacy92ej22t
05-08-2006, 12:47 PM
You'd think but you never know.
I have an extra coil pack or two laying around. Stop by sometime and I'll let you borrow one to try and run for a week or two. If you swap it in and the problem goes away, then you know.
strat81
05-08-2006, 05:29 PM
thanks matt... i appreciate it.
strat81
05-14-2006, 05:39 PM
update... borrowed a coil pack from matt, put it in, drove for 100 miles with no problems. now the car is doing it again though. car is throwing misfire on #1 and #2.
ecu? wiring? thoughts?
strat81
07-14-2006, 01:06 AM
update... plugs, wires, and cam/crank sensors have been replaced... STILL misfiring...
seems to only do it when the car goes into torque lockup... in 3 i haven't had it start misfiring today... somebody local suggested the igniter which controls the coil pack so i'll probably grab one from the local boneyard but i could really use some help on this one.
strat81
07-14-2006, 09:53 PM
well... thanks alot guys...
anyways, chalk it up to a faulty igniter... went to the junkyard today and picked one up and it fixed the problem... :roll:
Wiscon_Mark
07-17-2006, 11:49 PM
Good to hear spencer.
Is it teh fastAr now? :)
belladonna
07-18-2006, 08:52 AM
actually it's still doing it
strat81
07-18-2006, 09:18 PM
mark... a combo of that and some seafoam and the car is running pretty damn well. still doing it just a bit but not very frequently.
i dropped in matt's coil pack again to see if it'll fix the problem completely.
AussieDan
07-25-2006, 08:31 AM
Yeah...mine is still doing it too, but only in steady-state cruise at 75 or so.
I'd really like to get a 'real' OBD2 scanner and see what the O2 sensors are doing, as it's possible that the engine is trimming back the fuel too much and is actually running lean :shock:, not sure if I can handle shelling out that kind of money right now though.
Reason
07-25-2006, 04:34 PM
How is it running Spencer?
strat81
07-26-2006, 02:12 AM
horribly. one of the local subaru guys here wants to do a leak-down test on it as he's pretty sure i'm losing compression in one of the cylinders. (pop the oil cap off and there is no vaccum... it's actually pushing air out)
galek_98gt
07-26-2006, 09:19 AM
i changed my plugs 430miles ago and everything was running smooth again but today when i got started on my way to work that damn cel came on. this is frustrating.
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