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)
The midrange powerband on my 525i isnt all that great to begin with, I've been waiting for some extra cash to get a chip to improve that, however when i select sport mode *I drive an automatic * It seems to fix the problem.
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A chip slightly helps it. That is defintely a weird issue that it only works well when it is cold. I dont really know what to say. Maybe the fuel pump is the problem ro something? Good Luck and let us know what fixes it.
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