WiseXT Posted February 11, 2013 Share Posted February 11, 2013 While heading up to the mountains this weekend to take advantage of Nemo I stopped at a convenience store. My OBXT was running fine until them. When I started it again it was running rough, shook a ton under load and had a lack of power. The check engine light (and flashing cruise) was on and flashing at times. After talking with the dealer they said to not drive it when the check engine light is flashing so I had it towed home. I checked the codes and its throwing a cylinder 1 and cylinder 3 misfire. The service guy at the subaru dealer said it could of just been a short from all the snow getting up into the engine bay, but its been a couple days now and its still throwing the codes. I'm assuming cylinder 1 and 3 are on the same side of the engine. Anyone have an opinion on this? Where should I start? New plugs and wires? I haven't been able to find anything on here about both cylinder 1 and 3 misfires. Link to comment Share on other sites More sharing options...
Underdog Posted February 11, 2013 Share Posted February 11, 2013 I would look at fueling or vacuum leaks first, only because an ignition problem for both cylinders simultaneously is unlikely. How many miles are on the car? Cylinders 1 & 3 (bank 1) are on the passenger side of the car. The Crimson Dynamo Link to comment Share on other sites More sharing options...
WiseXT Posted February 11, 2013 Author Share Posted February 11, 2013 A little over 95k Link to comment Share on other sites More sharing options...
Underdog Posted February 11, 2013 Share Posted February 11, 2013 So it is due for plugs in the near future anyways... Worth pulling and having a look. I would do a compression & leakdown check while you are in there. Do you know if the passenger side banjo bolt filter has ever been checked? Are there any other codes besides the P0301 and P0303? Like a P0011, perhaps? The Crimson Dynamo Link to comment Share on other sites More sharing options...
WiseXT Posted February 11, 2013 Author Share Posted February 11, 2013 I do not know if the banjo bolt filter has been checked. Is it worth cleaning/replacing that as well? Nope, just the two codes. After clearing them last night I just took it out to see if anything has changed. The check engine light wasn't on until heavier acceleration. Then it would flash. The car is running rough though. Shakes at idle and vibrates while driving. Link to comment Share on other sites More sharing options...
Underdog Posted February 11, 2013 Share Posted February 11, 2013 Yes, at this point you need to assess the overall health of the turbo as well as the integrity of the motor. I would stop driving it immediately since catastrophic failure is a possibility, although it may still be something simple. If the car was in my shop I would be pulling the turbo to check it's health, checking the banjo bolt filter, and running the compression & leakdown check on bank 1 at a minimum. If you are lucky and catch it before it truly fails, the cost of repair is much less. The Crimson Dynamo Link to comment Share on other sites More sharing options...
WiseXT Posted February 11, 2013 Author Share Posted February 11, 2013 Alright... Thanks for the knowledge and the heads up. Link to comment Share on other sites More sharing options...
Underdog Posted February 11, 2013 Share Posted February 11, 2013 No problem. Let me know what the diagnosis is, or if you need any other help. The Crimson Dynamo Link to comment Share on other sites More sharing options...
Mr. Sinister Posted February 12, 2013 Share Posted February 12, 2013 My car is at the dealer right now for misfires on 1 and 3 as well. I expected it to be something simple like a vacuum leak but they determined it to be due to bad valve clearances. I hope yours is something simple. Link to comment Share on other sites More sharing options...
WiseXT Posted February 13, 2013 Author Share Posted February 13, 2013 The coil was the culprit. Replaced all 4 and the plugs. Back to pulling hard. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 13, 2013 Share Posted February 13, 2013 The coil was the culprit. Replaced all 4 and the plugs. Back to pulling hard. I wish mine was that easy . You say 'the coil'. Only one or both? Link to comment Share on other sites More sharing options...
WiseXT Posted February 13, 2013 Author Share Posted February 13, 2013 The coil in cylinder 3 was completely delaminated. They all looked bad but cylinder 3 was by far the worst. After clearing the codes we could only get cylinder 3 to misfire. So it may have been a false misfire when it threw cyl 1 or all the snow in the engine bay caused both to misfire but cyl 1 wasn't bad enough to misfire again after the bay dried out. Link to comment Share on other sites More sharing options...
Underdog Posted February 13, 2013 Share Posted February 13, 2013 Wow! That is great news. I am surprised that two coils would go simultaneously. *edit: just saw your clarification. Coil #3 does seem to get the worst of it... perhaps it's the opening for the UP that lets extra salt & moisture in. The Crimson Dynamo Link to comment Share on other sites More sharing options...
sleepercell Posted October 24, 2016 Share Posted October 24, 2016 I'm having cylinder 1 and 3 misfires I told my 07 lgt to the shop replaced the s.p. ngk of course and a coil pack then swaped them around. Next day c.e.l cylinder 1 n 3 misfire again. I read somewhere it mite be my engine isn't grounded or maybe I need new fuel lines? Anyone have any ideas smart ones lol thank you Link to comment Share on other sites More sharing options...
xt2005bonbon Posted October 24, 2016 Share Posted October 24, 2016 Was your timing belt recently changed? Link to comment Share on other sites More sharing options...
Eksster Posted August 17, 2017 Share Posted August 17, 2017 I am also having cylinders 1 and 3 misfire on my 05 OBXT. Converted to 6MT from 5AT and ROM changed to latest of OBXT manual trans ROM, but I'm guessing that's unrelated. Just changed fuel pump, cleaned MAF, reset idle... all things clearly helped my main issues, but still getting codes for 1 and 3 misfires. Engine stalls at times. Generally when going from 3rd or 4th to neutral and slowing to a light. Spark plugs changed a month ago with no noticeable change. Timing belt and the whole deal done 1.8 years ago. Only thing I'm thinking now is the coil packs. I have an extra set. Perhaps swap the 2 tomorrow. Doesn't seem promising though. Anyone got anything definitive on this issue? I guess FPR could be one to check. Already acquired and on my to do list to install is an aeromobile FPR, bigger injectors rails and lines. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted August 17, 2017 Share Posted August 17, 2017 Sounds like timing is off cause you're misfiring on the passenger bank of the engine. Link to comment Share on other sites More sharing options...
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