invue Posted September 12, 2008 Share Posted September 12, 2008 I have a 1998 Legacy GT LTD. The engine light now comes on (cylinder 4 misfiring) or off depending on the amount of gas in the tank. It's not an exact pattern but it is predictable. Any ideas? Link to comment Share on other sites More sharing options...
Googs79 Posted September 13, 2008 Share Posted September 13, 2008 It turns out there was a bad valve, so they are replacing the valve and the cylinder under the powertrain warranty. However I still need to pay 230 for the fuel injector cleaning they did and the initial diagnostics. I thought these boxer engines were supposed to run forever, I'm shocked that I am having this problem on a car that is only 3 years old. It is making me think twice about buying another subaru. Link to comment Share on other sites More sharing options...
Guest Posted September 15, 2008 Share Posted September 15, 2008 They trying to shaft you for the injector cleaning Call SOA. Link to comment Share on other sites More sharing options...
slim Posted September 15, 2008 Share Posted September 15, 2008 Only 21k with rough idle.Dealer said all he could do was injector cleaner for $ .Looking for a fast and easy solution I said ok.Car ran as smooth as new on the drive home.3 days later and idle is rough again.So it must be the injectors and I will return for warranted replacement as soon as convenient. Link to comment Share on other sites More sharing options...
slim Posted September 16, 2008 Share Posted September 16, 2008 They trying to shaft you for the injector cleaning Call SOA. I may call them one day but what could SOA say? Link to comment Share on other sites More sharing options...
OXT Posted September 20, 2008 Share Posted September 20, 2008 (edited) At about 60K my 05 Outback XT got cylinder #2 misfire codes. The idle is also rough when partially warm (line a minute after being started cold). Dealer replaced the fuel injector, recommended using Chevron gas. Did that, but the code is back. Spark plugs are new OEM, the dealer tried changing coils but it did not help. The dealer does not know what's wrong, and I hate to pay for them to replace good parts. After reading this tread, I think they should have swapped injectors to see if the problem follows the #2 cylinder injector, for example. Any suggestings on how to proceed? Edited September 20, 2008 by OXT Link to comment Share on other sites More sharing options...
Guest Posted September 20, 2008 Share Posted September 20, 2008 Do compression and leakdown test. Bad idle sometimes can be due to cracked piston ringlands. But then you would see some oil consumption most likely. Also check the banjo filter on the driver side (very hard to get to). There are reports that when clogged it could cause bad idle. Link to comment Share on other sites More sharing options...
OXT Posted September 22, 2008 Share Posted September 22, 2008 Do compression and leakdown test. Bad idle sometimes can be due to cracked piston ringlands. But then you would see some oil consumption most likely. Compression and leakdown are OK. I am more worried about misfires than rough idle, I mentioned the latter because they may be related. Also, no significant oil consumption. Link to comment Share on other sites More sharing options...
OXT Posted September 25, 2008 Share Posted September 25, 2008 Update: took a car to a different dealer, they claim my valves need adjustment and are bend. This sounds strange -- I thought the car had self-adjusting valves. Are valves covered by the powertrain warranty? Link to comment Share on other sites More sharing options...
Scimitar Posted September 25, 2008 Share Posted September 25, 2008 P0301 and P0302, is that misfire on 1 & 2? Sorry, not so good with Subaru engine codes Link to comment Share on other sites More sharing options...
invue Posted September 26, 2008 Share Posted September 26, 2008 Is there any long term damage to the engine if the light comes and goes? Filling the gas tank and the brand of gas seems to have a direct effect on the idling (and light) coming and going. Link to comment Share on other sites More sharing options...
pitks Posted September 30, 2008 Share Posted September 30, 2008 Yes. Carbon build-up on valves is getting bigger and bigger. After some time you will get misfire with any brand or octane of gas. Try 94 gas and see if you will continue getting misfire. If no - as you mechanic to use TerraClean solution to clean valves. It did the trick for me. I'm no longer getting any misfire on any type or brand of gas. Link to comment Share on other sites More sharing options...
homegrwn97 Posted October 5, 2008 Share Posted October 5, 2008 Just got a CEL code last night on my 05 LGT w/ 34K miles on it. Took it to autozone today and they said it was a "P0301 - Cylinder 1 misfire detected". The car is acting fine though....no rough idling or anything. What gives??? :confused: Please help Link to comment Share on other sites More sharing options...
Habitual Line Stepper Posted October 5, 2008 Share Posted October 5, 2008 Just got a CEL code last night on my 05 LGT w/ 34K miles on it. Took it to autozone today and they said it was a "P0301 - Cylinder 1 misfire detected". The car is acting fine though....no rough idling or anything. What gives??? :confused: Please help Misfire could be the result of many things. Problem is there is no way anybody on here would be able to tell exactly what it is. Take it to the dealer, your stock and still have your warranty let them deal with it, and dont worry misfires happen. "I for one do not doubt you, dude. Your car is fast and an internet legend." -Gire Link to comment Share on other sites More sharing options...
dtmenace Posted October 6, 2008 Share Posted October 6, 2008 +1 clear it & be done with it Link to comment Share on other sites More sharing options...
homegrwn97 Posted October 6, 2008 Share Posted October 6, 2008 Thanks for the info HLS!!! Link to comment Share on other sites More sharing options...
snowwhos Posted November 9, 2008 Share Posted November 9, 2008 I have a 1999 Legacy GT 2.5 non-turbo and have around 164k miles on the car. Just yesterday my engine light came on and checker said it was a p0304 #4 plug or wire misfire. Is everyone with this problem having bad injectors or should I start with replacing the plug and wire. Any input would be help full. Ps-after resting the code, this light comes on after a few drive and then starts flashing under acceleration then stays stead while driving. Link to comment Share on other sites More sharing options...
chuckzul Posted November 4, 2009 Share Posted November 4, 2009 I've got the same problem (i.e. P0304 code) on my 05 GT. After doing some searching and doing some research on this site, I've noticed an alarming trend of #4 cylinder coil pack, injector, and OCV failures. Here are my problems. My car idles poorly, not shaking, but poorly. It starts off with a bad stumble, but when it reaches a certain rpm, it starts to run better, not perfect, but better. I've replaced the drivers side OCV, this "seemed" to have made the idle better than it previously was (maybe it was wishful thinking on my part), still threw a P0304 code. I've checked for leaks and can find none. Here is my problem that nobody else has seemed to touch on, it has a lazy start. What I mean by that is, when I start the car, it is not the crisp, on one crank, start, it seems to roll before starting (hope that makes sense). The first shop I took it too said the compression was low in that cylinder, but that was before I replaced the OCV, so, I may have multiple issues going on here. I'm going to replace the #4 coil pack next, and then the injector, but, after that, I'm out of ideas. Any other advice out there from the esteemed panel of experts (no kidding, you guys are a lot of help). Thanks. Link to comment Share on other sites More sharing options...
05lgt5spd Posted November 12, 2009 Share Posted November 12, 2009 I'll join this club, I have a random cyl 4 misfire, way more pronounced within the first ten mins of driving. When it is super cold, it throws the code within 5 mins. Idles rougher when cold. Runs great in boost. Running dw740s. Def worse when cold. Any ideas if that sounds like a coil pack, or injector? Link to comment Share on other sites More sharing options...
NYtoVT Posted November 13, 2009 Share Posted November 13, 2009 I just had my block and turbo replaced under warranty and 1200 miles later, cylinder #3 misfire. Link to comment Share on other sites More sharing options...
05lgt5spd Posted November 13, 2009 Share Posted November 13, 2009 wow, thats insane, well i just pulled my plug, and there is no oil on it, so the ringland failure is out of the picture! Now i lost that damn spring the the coilpack! Link to comment Share on other sites More sharing options...
2.5gtbx_44 Posted December 29, 2009 Share Posted December 29, 2009 (edited) I dont know what is going on here! I am having what I believe is a misfire issue. It is however not throwing any codes. The symptoms are as follows: 1. When I free rev the car it stalls and dies 2. When driving the motor has hesitated and bucked really bad in any gear between 2k-3k rpm 3. The biggest issue is when it starts making boost it starts missing and breaking up real bad. Plugs have been replaced. There is fuel pressure. There seems to be no vacuum leaks or anything. I do not know what is going on. My tuner is kind of stumped as well. Any and all advice is wanted, needed, and greatly appreciated. Below is a video of the car on the dyno doing the breaking up thing. IMG_0339.flv video by s13slider44 - Photobucket@@AMEPARAM@@http://vid79.photobucket.com/player.swf?file=http://vid79.photobucket.com/albums/j133/s13slider44/IMG_0339.flv@@AMEPARAM@@vid79@@AMEPARAM@@79@@AMEPARAM@@j133/s13slider44/IMG_0339 Edited December 29, 2009 by 2.5gtbx_44 Link to comment Share on other sites More sharing options...
Break Beat Zen Posted December 30, 2009 Share Posted December 30, 2009 I had a misfire issue several months ago, cylinder number one if I remember. The car would start up fine and rev ok but after driving like a mile it would sputter really bad then die. Once it did that it would not start for about 3-5 min, then start up fine and I could drive normally again. I had a friend who’s is a Subaru mechanic come over with his diagnostic computer and he couldn’t really figure it out. We moved stuff around to see if the misfire would follow but it never did. It ended up being a dirty MAF, I had pulled it out and the little bulb sensor was visibly dirty. I sprayed it with some cleaners and put it back together. After that car was perfectly fine. Link to comment Share on other sites More sharing options...
bille Posted February 1, 2010 Share Posted February 1, 2010 Thanks for that, Break Beat. I'll look into it... I'm having pretty regular P0301 codes on my '05.Maybe I'll try the moving the injector also to check it? The first time it happened, I was sure I'd blow the car up (and I didn't yet know the trick to check the code myself) so I took it to the dealer ASAP. They screwed around with it for a day and decided to change the cylinder 1 coil. Two days later, after replacement, I got the CEL again, same cylinder (P0301). Now I can almost guarantee a CEL will come on if I idle for more than about 2 minutes. Of course one shouldn't idle for that long, but tell that to the traffic on the QEW or 401 Highways!Eventually, the CEL will go out on it's own after 100 km or so of driving, and a couple of re-starts. Could a dirty MAF cause this? Link to comment Share on other sites More sharing options...
2.5gtbx_44 Posted February 4, 2010 Share Posted February 4, 2010 Well my issue was a bad coilpack. I dont know which one or how it went bad but, I replaced all of them to be sure and that fixed the problem straight away. Just a FYI for anybody going through the same issue as me. Link to comment Share on other sites More sharing options...
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