5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I am hoping that someone may be able to shine some light on a problem I am having. I have a 2003 530d SE M-Sport Touring with approx 114k on the clock.
Driving the vehicle along the A14 I noticed that if I accelerated hard the engine would rev up to approx 2.5-3k and then flutter or may go to 3.5-4k and then flutter as if the rev limiter was cutting in. Placing the automatic gear box into Sport mode seemed to make it worse, presumably becuase it allowed to rev higher before changing up a gear. If you accelerated slowly there doesn't appear to be a problem and if the car is stationary in neutral it will rev up the dial without any problem. It is easily reproducible.
Connecting a diagnostics scanner, the software picked up a fault code of 1260 Delivery Pump Control system failure. Capturing live data seemes to show when the fluttering starts, the rail pressure drops from 1000 bar down to 500 and the pre injection fuel quantity drops to 0. Is this likely to be a fuel pump problem / fuel filter problem or ECU issue?
darkhorse 737, when you say check the psi of the fuel pump, which fuel pump do you mean? (As far as I know there are at least two - the lift pump in the tank itself, another under the passenger seat, but there may be others?)
Have you managed to fix your car Chris, and if so what was the remedy?
The excellent BMW specialist J+D vehicle repairs in High Wycombe diagnosed and replaced it in less than 30 minutes while I waited. According to their mechanic Mark, these pumps go quite frequently - if you are experiencing a loss of power as per my description then this would be my first suspect. Just try and avoid my amateur route of enthusiastically replacing the completely wrong pump first!
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