Rough Idle: Help

paul3232 · 08-12-2011, 11:01 PM

here are my stats, anyone know how to read this
Throttle 13%
RPM 666
Calc Load 22.7%
Timing Adv 2.5
Air Flow MAP .2 lb/min
ST Fuel Trim Bank 1 -30.5%
LT Fuel Trim Bank 1 +27.3%
ST Fuel Trim Bank 2 -28.9%
LT Fuel Trim Bank 2 +26.6%

air intake temp 105 deg
Coolant Temp 203 deg

O2 Sensor Bank 1 .865V
O2 Sensor Bank 2 .865V
O2 Sensor Bank 1 -.16 ma ratio .982
O2 Sensor Bank 2 +.09 ma ratio .979

AustinLonghorn · 08-17-2011, 10:40 AM

FWIW, my dealer checked and replaced two injectors (which definitely made an improvement on the rough idle, but it still seems to be there at times).

If I remember right, they also replaced the HPFP. There were no fault codes in either case, just a rough idle (that they'd previously diagnosed as "that's the way the N54 runs").

The injector recall campaign is 10E-A02 (SI B 13 14 10)

Some other related service information bulletins for the N54:

13 05 08
13 08 09

12 46 06
12 25 09

24 03 08

08-12-2011, 11:01 PM	#67
paul3232 New Member 0 Rep 5 Posts Drives: 2006 BMW 330i Join Date: Jul 2011 Location: United States iTrader: (0)	Rough Idle here are my stats, anyone know how to read this Throttle 13% RPM 666 Calc Load 22.7% Timing Adv 2.5 Air Flow MAP .2 lb/min ST Fuel Trim Bank 1 -30.5% LT Fuel Trim Bank 1 +27.3% ST Fuel Trim Bank 2 -28.9% LT Fuel Trim Bank 2 +26.6% air intake temp 105 deg Coolant Temp 203 deg O2 Sensor Bank 1 .865V O2 Sensor Bank 2 .865V O2 Sensor Bank 1 -.16 ma ratio .982 O2 Sensor Bank 2 +.09 ma ratio .979
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08-17-2011, 10:40 AM	#68
AustinLonghorn New Member 0 Rep 25 Posts Drives: '92Daihatsu,'02EX500 Join Date: Feb 2007 Location: Austin, TX iTrader: (0)	FWIW, my dealer checked and replaced two injectors (which definitely made an improvement on the rough idle, but it still seems to be there at times). If I remember right, they also replaced the HPFP. There were no fault codes in either case, just a rough idle (that they'd previously diagnosed as "that's the way the N54 runs"). The injector recall campaign is 10E-A02 (SI B 13 14 10) Some other related service information bulletins for the N54: 13 05 08 13 08 09 12 46 06 12 25 09 24 03 08
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