BMW E90 M3 - Lean Lambda at WOT

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SyvecsM3
Posts: 3
Joined: Fri Jan 22, 2021 7:12 pm

BMW E90 M3 - Lean Lambda at WOT

Post by SyvecsM3 »

Hey fellas,

I apologize as I can't provide any data logs because my ECU is pass controlled and I can only view errors.

So the setup is as follow :
S65 V8 - 6MT - Supercharged -E85 - Meth

I'm having an issue with pre cat o2 sensors dying in every 2000kms or so and it always one of the banks & never both sides for some reason, and I'm asking whether this might mean that my S6+ unit is faulty or not

the car won't through an error till I hit WOT, and when the error is cleared it will drive normal till the next time boost goes beyond 0.2bar at full throttle.

I'm really sorry as I don't have any tunning background whatsoever and I'm trying to explain the problem as I experience it driving my car ... I know for sure o2 sensors shouldn't die every 2000 km and I'm starting to think that I might be having a faulty ECU ... can I have your feedback on this, please?
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GINTANI STAGE X 723WHP | Built Motor | SYVECS S6+ ECU | SPEC Dual Plates Stg 3 | CAE Shifter |Brembo 380 BBK | MRF ICEBOX KIT | ARH headers | 4.10 Dinan Diff | DSS CF Shaft |Toucan Screen
stevieturbo
Posts: 1007
Joined: Sun Dec 07, 2008 2:04 pm

Re: BMW E90 M3 - Lean Lambda at WOT

Post by stevieturbo »

A faulty ecu is unlikely.

But best advise is get it to your local Syvecs dealer/tuner who can look at it.

What sensor is it you are using ?
SyvecsM3
Posts: 3
Joined: Fri Jan 22, 2021 7:12 pm

Re: BMW E90 M3 - Lean Lambda at WOT

Post by SyvecsM3 »

Thanks

Im using OEM BMW sensors
Image
GINTANI STAGE X 723WHP | Built Motor | SYVECS S6+ ECU | SPEC Dual Plates Stg 3 | CAE Shifter |Brembo 380 BBK | MRF ICEBOX KIT | ARH headers | 4.10 Dinan Diff | DSS CF Shaft |Toucan Screen
SyvecsM3
Posts: 3
Joined: Fri Jan 22, 2021 7:12 pm

Re: BMW E90 M3 - Lean Lambda at WOT

Post by SyvecsM3 »

Fixed - bad sensor


Outstanding support from SYVECS team in Dubai ..
Image
GINTANI STAGE X 723WHP | Built Motor | SYVECS S6+ ECU | SPEC Dual Plates Stg 3 | CAE Shifter |Brembo 380 BBK | MRF ICEBOX KIT | ARH headers | 4.10 Dinan Diff | DSS CF Shaft |Toucan Screen
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