Smell when driving fast
04-10-2010, 02:23 AM
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Hi all. I have a smell like something is burnt when driving fast or accelerate hard for some time. The smell quickly disappear when I drop the speed. There is no smell in idle or if I drive with normal speed. What might be the probelm? Thanks.
04-10-2010, 04:58 AM
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It is hard to tell just for what you described but one good recommendation is to stop immediately after you detect the smell or burn and look out for the origin of the smell. Chances are the you are going to find the root cause of the smell since it would be still there or at least it is going to direct you to the area in trouble. GL
04-10-2010, 08:31 AM
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My Ride: 2008 550i Jet Black on Black Leather, SAT with Paddles, Logic 7, Comfort Seats, NAV, Sport Package, PDC, Xenons, Sirius, Trinity 12W LED Angel Eyes, RPi GT Exhaust, M rear spoiler, ACS Roof Spoiler, Tinted Tail Lights, Bimmian Carbon Fiber Pillar Trim, Bimmian Shadow 550i emblem, RPi Scoop, E60 Forum Cling, Mtec bulbs in fog lights, Mtec 2W LED for License Plate Light Bulbs, K&N Filter, Bimmian LED Smoked Side Markers, Blackout roundels, Carbon Fiber Kidney Grills.
Retired Rides - 1989 325i convertible, 1995 M3, 2002 X5, 2005 545i, 2008 X5 (Lemon)
The "burning carcass" of the car you just raced??? 
04-10-2010, 05:26 PM
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My Ride: 2004 545i, 6-speed Manual, Silver Grey Metallic, Grey Dakota Leather, Cold Weather Pkg, Premium Sound Pkg, Sport Pkg, Lumbar Support
It's not a problem. What you describe is completely normal.
04-10-2010, 06:24 PM
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- There are known oil leak problems on some V-8 models. The oil may not be readily apparent by staining until the leaks are quite large. Do you experience any unusual oil consumption?
- Cooling system leaks are sometimes first detected by a sweet smell when some coolant hit hot engine parts. At low speed the smell might not be apparent. How is your coolant level?
- Sometimes water and road grime coats the exhaust system and will burn off under hard driving but not as noticeable at low speeds. A good under-car wash might be in order if 1 & 2 are not the problem.
OH - forgot one ... any small animals reported missing in your neighborhood
