misfire and power loss tried injector cleaner now i hear a little rattling from on 2005 BMW 645Ci

engine what should i do next

by in Los Angeles, CA on March 04, 2012
1 answer
ANSWER by on March 05, 2012
See if you can get the codes pulled from the DME (engine control module). Power loss (especially at higher RPMs), misfiring and rattling sound could be a sign of catalytic converter failure.