K&N install & CEL + limp mode

CanAutM3 · 05-01-2012, 08:17 AM

I installed a K&N drop-in last Thursday. I got two CEL and reduce power warnings on the way to the track on Saturday

. Fixed by shutting down the engine and re-starting. Then on the track, on my first session, I got two other CEL and reduced power

. I was quite anoyed as I had to pit and restart the car to get rid of the problem. Loosing precious track time

. Then, I had a CEL for increased emisions but no reduced power. It stayed on for half the day and then disapeared.

The good news though, is that after the limp modes the car seemed to run much smoother and semmed to breath better

.

I am guessing the car's ECU was adapting to the new filter

. Or is it totally unrelated...

Has anybody else seen this???

THE TECH · 05-01-2012, 08:39 AM

Seems odd. You'd have to check the codes though.

05-01-2012, 08:17 AM	#1
CanAutM3 General 21121 Rep 20,741 Posts Drives: 2021 911 turbo Join Date: Jan 2012 Location: Montreal iTrader: (1) Garage List 2022 Audi RS6 [10.00] 2021 Porsche 911 turbo [10.00]	K&N install & CEL + limp mode I installed a K&N drop-in last Thursday. I got two CEL and reduce power warnings on the way to the track on Saturday . Fixed by shutting down the engine and re-starting. Then on the track, on my first session, I got two other CEL and reduced power . I was quite anoyed as I had to pit and restart the car to get rid of the problem. Loosing precious track time . Then, I had a CEL for increased emisions but no reduced power. It stayed on for half the day and then disapeared. The good news though, is that after the limp modes the car seemed to run much smoother and semmed to breath better . I am guessing the car's ECU was adapting to the new filter . Or is it totally unrelated... Has anybody else seen this??? Last edited by CanAutM3; 05-01-2012 at 08:30 AM..
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05-01-2012, 08:39 AM	#2
THE TECH BimmerPost Supporting Vendor 307 Rep 13,093 Posts Drives: BPMsport 2012 E92 M3 Join Date: Jun 2011 Location: Kansas iTrader: (45) Garage List 2013 Nissan GTR [0.00] 2019 Sierra Denali ... [0.00] 1999 Nissan Silvia [0.00] 1999 Nissan Skyline ... [0.00] 1998 Toyota Supra [0.00]	Seems odd. You'd have to check the codes though.
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