2008 550 Hesitation 2500-4000 RPM
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From: Boston, MA
My Ride: 2008 550 6 speed Carbon Black, Gray Dakota Leather, Black Bamboo Trim, Sport Package, Cold Weather Package, Sun Shades, Aux Input
I recently brought my 550 with a 6 speed manual (that has about 4k miles on it) to the dealer to complain about how the car accelerates between 2500 and 4000 RPM. It is very noticable in the higher gears (4-6) but I have also noticed it in 2nd and 3rd.
If you are cruising along at 2500 RPM and press the gas about 50-75% down - it bogs down and then accelerates but rough. It is hesiatating and feels like it is almost skipping a beat. I was wondering if anyone else has had this.
The dealership said it is running fine but they said come back and drive it with the shop foreman - which I plan on doing this week.
I was wondering if it could be a fault in the VANOS - but the dealership reported no faults were detected by the computer.
thanks
Michael
If you are cruising along at 2500 RPM and press the gas about 50-75% down - it bogs down and then accelerates but rough. It is hesiatating and feels like it is almost skipping a beat. I was wondering if anyone else has had this.
The dealership said it is running fine but they said come back and drive it with the shop foreman - which I plan on doing this week.
I was wondering if it could be a fault in the VANOS - but the dealership reported no faults were detected by the computer.
thanks
Michael
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From: Clarendon/Tysons Corner, VA
My Ride: See Signature
Model Year: 2015
Engine: N55
Sounds like a delay in the throttle's response time... this will be fixed with a Sprint Booster. This video will show what i'm talking about... hope this helps.
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From: Clarendon/Tysons Corner, VA
My Ride: See Signature
Model Year: 2015
Engine: N55
Thread Starter
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Joined: Jun 2005
Posts: 43
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From: Boston, MA
My Ride: 2008 550 6 speed Carbon Black, Gray Dakota Leather, Black Bamboo Trim, Sport Package, Cold Weather Package, Sun Shades, Aux Input
Originally Posted by DRANGED' post='675283' date='Sep 22 2008, 11:29 AM
Let us know what you find out when you take it for a drive with the shop foreman.
I am just glad he felt the same thing so now they need to figure out what the issue is.
I will report back hopefully not too long after 10/6
- M
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Joined: Jun 2005
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From: Boston, MA
My Ride: 2008 550 6 speed Carbon Black, Gray Dakota Leather, Black Bamboo Trim, Sport Package, Cold Weather Package, Sun Shades, Aux Input
A quick update -
BMW has had my car for 3 days now and they ran a bunch of tests that BMW NA asked them to run and all came back OK. They upgraded the software but that didn't make a difference.
Now they are ordering a Air Mass Meter - which is a stab in the dark but is the most liikely component according to the shop foreman.
I should hear more tomorrow
- Michael
BMW has had my car for 3 days now and they ran a bunch of tests that BMW NA asked them to run and all came back OK. They upgraded the software but that didn't make a difference.
Now they are ordering a Air Mass Meter - which is a stab in the dark but is the most liikely component according to the shop foreman.
I should hear more tomorrow
- Michael
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My Ride: 2011.5 Alpine White E90 M3 | Black Novillo Leather | Carbon Fiber Leather Trim | ZCP | ZP2 | M-DCT | Navigation | Moonroof | 6FL Mods: TMS 12.5mm spacers all around l Hawk HPS Brake Pads l OEM M3 Edition Grills l Paint Matched Side Gills l Key Hole D
GL, hope the Air Mass Meter is the fix, keep us posted 
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From: LA/Taiwan
My Ride: E60
Originally Posted by safetywork' post='688758' date='Oct 9 2008, 01:43 PM
Did you notice the DTC light come on when you do this? And are you sure you're not lugging the engine?
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From: New Jersey
My Ride: '05 545 Titanium Silver, Black Leather - Nav, Logic 7, Cold weather.
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Originally Posted by BigMike' post='688777' date='Oct 9 2008, 02:22 AM
Does jamming on the accelerator all the way light up the DTC for a split second? I get that when I suddenly jam on it all the way.......
