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-   -   Single Turbo 335i fuel trim problems. (https://www.n54tech.com/forums/showthread.php?t=63483)

chrisvscars 09-29-2020 08:48 PM

Single Turbo 335i fuel trim problems.
 
Hi, so i got my single turbo 335i back about 2 weeks ago, and she drives fine, when she is at idle first thing in the morning its a little rough, but other than she drives fine.

i did a few 3rd gear logs and the car was perfect and pulled hard.

Yesterday i tried a 2nd gear pull into third and the car went into safety at around 5k rpm, and when i checked the logs i saw it was fuel trim variance.

trim one was close to 40 and trim 2 was at like 12.

Mods.
Gt35 turbo
walbro 450
FBO
BEF
JB4

chrisvscars 09-30-2020 06:25 AM

i fixed it
 
The O2 sensors where the wrong way around

Dave @ BMS/Fuel-It! 10-03-2020 06:04 AM

Quote:

Originally Posted by chrisvscars (Post )
The O2 sensors where the wrong way around

That happens pretty often, glad you got it sorted & quick.

Throw up a log if you want some advice or a second set of eyes on it.

Enjoy your weekend & stay safe.


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