vincent17 0 Report post Posted February 1, 2009 hi, i'm abit of novice to the bmw engines for the moment, I have fittted in a new trans to my 25i and have done it pretty much without a book so its not exactly bang on but we have a runner, with a little problem that didnt exist beforec the trans was fitted. The motor is surging off idle till about 1500 - 2000 rpms I have sort of narrowed it down to the vacume set up on the motor not perhapes operating correctly. Does anyone know what is causing this to happen. Thanks Vince Quote Share this post Link to post Share on other sites