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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning Timing issue?

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      11-27-2022, 09:13 PM   #1
Lingling
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Timing issue?

I think im running in to timing issues but idk what the cause of it is, the spark plugs are less than 3,000mi gapped 0.022 and the ignition coils are dinan ones which were installed 10,000ish mi ago.
All logs are done on 93 pump gas, 3rd gear, 2500-6500rpm

Car: 2015 M235i 6MT

Stage 2 91ACN AGG:
https://www.bootmod3.net/log?id=637f...729b3bae0d2625
https://www.bootmod3.net/log?id=637f...0b43f7e1943976
https://www.bootmod3.net/log?id=637f...90c6e5952f92b9
Stage 1 93
https://www.bootmod3.net/log?id=637f...90c6e5952f92d6
https://www.bootmod3.net/log?id=637f...729b3ec75e4415
Stage 1 91ACN before refill
https://www.bootmod3.net/log?id=637f...0b43fb4643d19e
Stage 1 91ACN After refill
https://www.bootmod3.net/log?id=637f...0b43f7e19439ba
https://www.bootmod3.net/log?id=637f...729b3bae0d267d
https://www.bootmod3.net/log?id=637f...90c6e5952f92fe
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      12-02-2022, 10:35 PM   #2
Dj_Quik
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looks like octane issue. the fuel you are using is good enough got the 91 acn maps but barely. defs cannot run stage 2 maps or regular stage 1 91/93 map
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      12-02-2022, 11:14 PM   #3
Lingling
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Quote:
Originally Posted by Dj_Quik View Post
looks like octane issue. the fuel you are using is good enough got the 91 acn maps but barely. defs cannot run stage 2 maps or regular stage 1 91/93 map
That's crazy I never thought NJ had that poor of gas I've running Sunoco for so long
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      12-03-2022, 12:27 AM   #4
Dj_Quik
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you could try running some ethanol to see if it will clean up your timing. also, the misfire could be from the .022 spark plug gap being to narrow. try opening up the gap first to something like .028 then pour in some ethanol then relog.
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      12-03-2022, 12:35 AM   #5
Lingling
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Quote:
Originally Posted by Dj_Quik View Post
you could try running some ethanol to see if it will clean up your timing. also, the misfire could be from the .022 spark plug gap being to narrow. try opening up the gap first to something like .028 then pour in some ethanol then relog.
Word I'll take care of that this weekend I got fresh NGK coming in thank FCP for lifetime warranty lol
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      12-03-2022, 12:38 PM   #6
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Running tighter plugs gaps on these cars rarely ends well. I don't why so many recommend still doing this.
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      12-03-2022, 02:46 PM   #7
Lingling
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Running tighter plugs gaps on these cars rarely ends well. I don't why so many recommend still doing this.
0.028 good? I'm currently at 0.022
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