RPM constantly swings between 4-500 for 2005 545i
04-22-2008, 09:45 PM
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Hi guys,
I noticed that when the engine is warmed up, the RPM is idling between 4 to 500. What I mean is that it constantly swings between 4 to 500, unlike all my other V6 bMW which the RPM does not swing.
Does anyone with 545 knows if this is normal or not?
Thanks,
I noticed that when the engine is warmed up, the RPM is idling between 4 to 500. What I mean is that it constantly swings between 4 to 500, unlike all my other V6 bMW which the RPM does not swing.
Does anyone with 545 knows if this is normal or not?
Thanks,
04-22-2008, 10:05 PM
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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)
I also drive a 2005 545i and the engine when cold, does exactly the same thing. Not sure if it's a problem, but it does appear to be common! 
04-22-2008, 10:10 PM
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Originally Posted by flyingpuck' post='566318' date='Apr 23 2008, 02:05 AM
I also drive a 2005 545i and the engine when cold, does exactly the same thing. Not sure if it's a problem, but it does appear to be common!
04-22-2008, 10:23 PM
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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)
Originally Posted by danwu' post='566320' date='Apr 22 2008, 11:10 PM
But mine does it when the engine is warmed up. So basically mine idling swings between 4-500 rpm at all time, does yours swings when it is warmed up?
04-23-2008, 11:41 AM
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Originally Posted by flyingpuck' post='566325' date='Apr 23 2008, 01:23 AM
Well now that I think of it, sometimes when I stop at a signal, it will do it, but in all cases it quickly goes back to "Normal". Either way, I don't think anything is wrong with the car, its just a bit eccentric!
04-23-2008, 12:11 PM
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Originally Posted by Kenny@JleviSW' post='566655' date='Apr 23 2008, 03:07 PM
I dont think that's something to be worried about. Now if it was fluctuating between say 500-1000 RPM then maybe there is a problem. Otherwise, it sounds normal to me.
04-25-2008, 04:15 PM
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My Ride: 2008 BMW 550i M Sport
I have a friend working for BMW. I used to have the same issue. I was told to take it to the high speed (over 120mph) drive for a couple of minutes. So I did. Now the problem is gone.
It is very strange but the problem is gone for now. My guess is that there was extremely large amount of fuel going through injectors, but I am not sure.
drive for a couple of minutes. So I did. Now the problem is gone. It is very strange but the problem is gone for now. My guess is that there was extremely large amount of fuel going through injectors, but I am not sure.