[Crulexis]

OP should take those plugs to dealer and demand to speak to someone from BMW NA about it

[psmitty95]

Originally Posted by Crulexis

OP should take those plugs to dealer and demand to speak to someone from BMW NA about it

Ehh idk if it's worth it... They have been awful in more ways then one. Got my car back at that 48k service with gum on the pedals, broken cowl, and scratched intake piping. They also didn't fix what I was complaining about (brake squealing). I wound up just giving up with them and doing a upgraded brake kit out of warranty

[Eleventeen]

The ignition is not the issue. That O2 code is the key to this whole thing. Either the sensor is bad, or it's pointing to a different fueling issue. Either way, the misfires are being caused by an incorrect A/F ratio on bank 2.

[psmitty95]

Originally Posted by Eleventeen

The ignition is not the issue. That O2 code is the key to this whole thing. Either the sensor is bad, or it's pointing to a different fueling issue. Either way, the misfires are being caused by an incorrect A/F ratio on bank 2.

Hmm interesting theory and definitely plausible. I'll do some logs tomorrow and the car will also hopefully be at the shop Sat. up on a lift. On a positive note I ran the car hard for a good amount of the day today and couldn't get it to misfire

[themyst]

I am guessing if you misfired immediately after the plug install you didn't reset adaptations. INPA is the only surefire way to do it IMO.

Also, make sure you torque those plugs down to 17 lbs. Book spec.

[psmitty95]

Originally Posted by themyst

I am guessing if you misfired immediately after the plug install you didn't reset adaptations. INPA is the only surefire way to do it IMO.

Also, make sure you torque those plugs down to 17 lbs. Book spec.

Plugs were torqued down to right around 17. Couldn't tell exactly cause the gauge on my torque wrench was facing down so it was awkward checking but I got it right around 17 ish. I didn't reset adaptations but I didn't misfire immediately after plugs. car ran great for a few hours then during one 2nd gear pass I misfired next day. After that ran the car hard the rest of the day and today and no misfires so far

[themyst]

Originally Posted by psmitty95

Plugs were torqued down to right around 17. Couldn't tell exactly cause the gauge on my torque wrench was facing down so it was awkward checking but I got it right around 17 ish. I didn't reset adaptations but I didn't misfire immediately after plugs. car ran great for a few hours then during one 2nd gear pass I misfired next day. After that ran the car hard the rest of the day and today and no misfires so far

Could be cause your car is adapting? The ECU does have compensations for worn plugs.

[psmitty95]

Originally Posted by themyst

Could be cause your car is adapting? The ECU does have compensations for worn plugs.

Yea that could definitely be possible. Tomorrow i'll be driving it a bit more so i'll let you guys know if I feel any surging or anything.

[drjekl]

I have similar symptoms to you, and when I went to change the plugs and coils I noticed some oil in the spark plug cavity for cyl #2.

Apparentley this can mean my valve cover gasket is leaking, and if this leaking it can cause erratic idling stumbling etc...

I haven't noticed any excessive oil loss (in 8 months driving I only added 500ml's to it a few weeks ago) but apparently this gasket leak is quite common

After changing all of the coils last night, nothing has changed it still stumbles at low speeds in a higher gear and when I went wot in 3rd gear it chucked a CEL...

[psmitty95]

Originally Posted by drjekl

I have similar symptoms to you, and when I went to change the plugs and coils I noticed some oil in the spark plug cavity for cyl #2.

Apparentley this can mean my valve cover gasket is leaking, and if this leaking it can cause erratic idling stumbling etc...

I haven't noticed any excessive oil loss (in 8 months driving I only added 500ml's to it a few weeks ago) but apparently this gasket leak is quite common

After changing all of the coils last night, nothing has changed it still stumbles at low speeds in a higher gear and when I went wot in 3rd gear it chucked a CEL...

I didn't notice oil in the spot with the plugs but then again I did it at night and wasn't checking the spot... It has seemed like its gone away though. Today was another day driving the car hard and getting no codes. I took some better pics of the plugs which i'll throw up later. I'm also going to put up my logs from last weekend when it was misfiring

[drjekl]

Originally Posted by psmitty95

I didn't notice oil in the spot with the plugs but then again I did it at night and wasn't checking the spot... It has seemed like its gone away though. Today was another day driving the car hard and getting no codes. I took some better pics of the plugs which i'll throw up later. I'm also going to put up my logs from last weekend when it was misfiring

Fair enough dude, just something to consider I guess

[psmitty95]

Originally Posted by drjekl

Fair enough dude, just something to consider I guess

Yea definitely thanks for the suggestion. That's what i'll check next if they come back

[drjekl]

Originally Posted by psmitty95

Yea definitely thanks for the suggestion. That's what i'll check next if they come back

Like you I can drive the car hard for a week with no issue, then bam out of the blue it starts popping up.

One thing I have noticed at low speeds 1st-2nd gear redline type wot its ok, but it seems to chuck a CEL when in 3rd and then going wot at higher speeds...

[psmitty95]

Originally Posted by drjekl

Like you I can drive the car hard for a week with no issue, then bam out of the blue it starts popping up.

One thing I have noticed at low speeds 1st-2nd gear redline type wot its ok, but it seems to chuck a CEL when in 3rd and then going wot at higher speeds...

Hmm interesting when mine first started it was the exact opposite. Easiest way for me to trigger misfire back then would be doing a 1-2 pull. I did 1-2, 3-4, etc today and it was pretty good. Still going to do valve cleaning though and keep pushing the car trying to get it to misfire. Also still going to check those rear o2's and exhaust leak

[psmitty95]

Ok got an update for you guys. First of all here's some daytime pics of the plugs:







And next are logs from the weekend when I was getting all those misfires.

3rd gear pull:


Log when misfire happened:

[marv85]

your AFRs are ugly! it might be related to running lean.

would you mind running map 1? also what is the open fuel mapping set to?

[psmitty95]

Originally Posted by marv85

your AFRs are ugly! it might be related to running lean.

would you mind running map 1? also what is the open fuel mapping set to?

I think open loop was at 95 for that since it says it at the top. I'll do a map 1 log tomorrow if I get a chance. Those logs are from last weekend not after plugs keep in mind. I do think o2 might be messed up though...

[marv85]

Originally Posted by psmitty95

I think open loop was at 95 for that since it says it at the top. I'll do a map 1 log tomorrow if I get a chance. Those logs are from last weekend not after plugs keep in mind. I do think o2 might be messed up though...

we;ll see, on map1 with the same open loop you should be running richer. Let's see if you misfire or not

[psmitty95]

Originally Posted by marv85

we;ll see, on map1 with the same open loop you should be running richer. Let's see if you misfire or not

Well i've been running map 5 all weekend and no misfires since that 1 on saturday

[marv85]

fingers crossed

[SCS15]

Originally Posted by psmitty95

Well i've been running map 5 all weekend and no misfires since that 1 on saturday

And boy was it pulling hard yesterday...you didnt misfire did you

[psmitty95]

Originally Posted by marv85

fingers crossed

Thanks man

Originally Posted by SCS15

And boy was it pulling hard yesterday...you didnt misfire did you

I don't think so... Didn't feel any stumbling and definitely no codes. Drove it hard today too and didn't misfire either. I think plugs might have done it but time will tell. Hahaha even though it was pulling pretty hard I still can't get over your buddy's car with the meth... Once everything is running right that will be my next "go" mod. Show mods are done once I can get this stupid lip mounted