I have just fitted a K&N 57i induction kit to my 98 523.
When driving, all of a sudden she will start to pop, cough and fart and sometimes stall, then, may run fine for a while before doinig the same again.
Everything is connected correctly and I have reset the ecu by removing the negative battery lead for half an hour.
Is a beamer one of those cars where you have to remove a fuse to the ecu to reset it????
Any help greatly appreciated.