Struggling to maintain speed on motorway gradients

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Feb 11, 2010 | 12:10 PM

hpi4

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Joined: Jan 2010

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Hi all

Can anybody help... I have a 520d manual and have noticed that when approaching gradients on the motorway the car loses speed and wont accept the throttle when i try and compensate for the speed loss. Even smaller engine cars seem to brush pass!! Today I had the car diagnosed by the AA his machine found no fault codes. Anybody have any ideas please.

Feb 11, 2010 | 05:44 PM

sholaesq

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Joined: Dec 2006

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From: Atlanta, GA

Try changing the airfilter

Feb 11, 2010 | 06:23 PM

CWS530

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Joined: Dec 2007

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From: St. Louis Burbs, USA

My Ride: 2007 530i. Purchased 6/28/07. Titanium Silver Metallic, Black Dakota Leather, Dark Poplar Trim, Steptronic, Premium Package, Cold Weather Package, Bluetooth, Adaptive Control Xenons. 10/30/07 Added OEM 124s with 245/40/18 & 275/35/18 Michelin Pilot Sport A/S tires. Installed red Cal Coversï¿½ from BavAuto. 11/21/07 Added OEM all-weather floor mats (for winter, carpet in summer) and coat rack. 6/26/08 installed M5-style rear spoiler. 6/30/08 put on red reflectors. 8/22/08 Euro turn signal stickers applied. 3/20/09 Installed Shadowline Trim. 3/27/09 Added Matte Black Kidney Grilles from Trinity. 4/03/09 Installed Bimmian Shadow Matte Black 530i Badges. 4/04/09 Installed LED license plate lights from Trinity. 5/01/09 Installed Brabus Interior LED Kit and White Angel Eyes. 5/02/09 Put in Brabus 6K Fogs. 5/14/09 Removed charcoal filter. 5/15/09 Installed light smoke LED side marker lamps from Trinity. 5/21/09 Sprint Booster. 6/12/09 Painted exhaust tips flat black. 6/13/09 Pulled red Cal Covers and painted calipers low gloss black. 6/27/09 RPI Ram Air Scoop from Trinity. 8/15/09 Installed Brabus's silver invisibulbs front and rear. 9/24/09 Installed R-Dash license plate LEDs from Brabaus (John).

Am I mistaken, or is this the third time you've started a thread on this subject? Try taking the car to a mechanic if you would like something beyond the conjecture of random people on an internet forum.