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PLF's Avatar
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Car: 135i
Default hesitation misfire kind of problem - 08-16-2016, 09:06 AM

Hey guys I finished my car and started driving it to break in my new clutch after about 250miles I realised my jb4 was in mod 4\4 so I switched to 4\2 and afterwards I started having some sort of hesitation in higher gears below 3k rpm but to codes after continuing driving it got worse and now at idle and all revs it feels like misfires.

I logged but only thing I could find is afr2 being leaner and having different behaviour here are all the things I checked + some logs

- 6 brand new NGK plug gapped .22 made no difference
- swapped 6 coils with known good one made no difference
- leak test done to leaks in piping vacuum etc
- tried 3 different flash and jb4 off\on etc no difference

Let me know what you think

Thanks !!!
Attached Files
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File Type: csv 2016-08-16 11_44_22.csv (9.3 KB, 184 views)
File Type: csv 2016-08-16 11_43_56.csv (7.6 KB, 195 views)
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Steve @ BMS/Fuel-It!'s Avatar
Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
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Default 08-16-2016, 09:20 AM

Maybe a bad or damaged bank two O2 sensor? That definitely doesn't look right.



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Default 08-16-2016, 10:23 AM

No matter how hard I try to make it code it's a no go, I think O2 could be a good lead since I was a little careles with them when installing my turbos...
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Default 08-22-2016, 06:58 AM

PROBLEM FOUND, for future reference:

I finally managed to make the car throw a misfire code by lugging the engine the most I could and the problem a dead injector on cyl 6
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