Can someone confirm my suspicion of a leaking injector?

hellokitty

Specialist
May 23, 2018
73
32
0
Ride
2012 335iS DCT E93
I uploaded 3 short logs here. I went down in E content since my HPFP couldn't keep up. HPFP seems to have stabilized but I always stutter and misfire on Cyl 3 at WOT.

lambda on bank 1 never really recovers to 234 after the log. I am thinking of pulling injector 3 and seeing if that is the problem.

New index 12 injectors were installed less than 10k miles ago from FCP. Seems like I'll need to use their warranty sooner than I thought if this is the case.

 

JohnDaviz

Lieutenant
Jan 6, 2019
863
577
0
Ride
335i E92 DCT
I have the same issue for months now. Since changing to six brand new Index 12 injectors.

Sometimes Bank 1 goes back to 234. But often stumbles around below 234.
But basically everything else is working flawless. AFR is equal to bank 2 as soon as i touch the throttle and overnight cold starts are perfectly fine.

I am suspecting a faulty O2 Sensor rather than injectors as in the first minutes of cold running engine everything is fine.

Check if everything is fine after cold start and within the first mile.
 

Traf

Sergeant
Aug 3, 2017
344
197
0
Ride
135i
Cold start should help you diagnose this, unstable idle and strong fuel smell on cold starts is most likely a leaky injector.
At least it was on mine.
 
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