R50/53 Popping sounds from engine/exhaust when coming down to idle after pulley upgrade
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Popping sounds from engine/exhaust when coming down to idle after pulley upgrade
Last weekend I installed the Way Motor Works pulley kit (15% pulley, belt and plugs). Everything went in just fine, but now I am getting some troubling "popping" sounds when the car is coming down to idle from higher RPMs (when decelerating or coming to a stop). I reset the ECU after the change. The popping sounds is noticeable, and sounds a bit like backfiring. It doesn't do it every time the car drops to idle, but it does it enough to raise some concern. Any ideas what might be causing this or what I can do to make it stop?
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Well, being an R56 owner I'm not sure how qualified I am to answer the question as to why the sound suddenly showed up after installing the pulley.
I can tell you that the pop and burble is supposed to be there for R53s, but it is especially prevalent for MINIs built between 2005 and 2006. People complained so much about it, a service bulletin was put out. This resulted in MINI taking the sound away for Cooper S MINIs built between 2007 and 2010, only to put it back for 2011+.
My best guess would be the 15% pulley just made the sound much more noticable in your 2005, but maybe some R53 people can chime in and give you a better answer.
I can tell you that the pop and burble is supposed to be there for R53s, but it is especially prevalent for MINIs built between 2005 and 2006. People complained so much about it, a service bulletin was put out. This resulted in MINI taking the sound away for Cooper S MINIs built between 2007 and 2010, only to put it back for 2011+.
My best guess would be the 15% pulley just made the sound much more noticable in your 2005, but maybe some R53 people can chime in and give you a better answer.
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Close... More boost = more heat thus the cat gets hotter. MINI's are programmed to have the burble by pushing excess fuel into the exhaust.
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So is the pop and burble possible with an automatic transmission on an '06 MCS? I hope so as I plan on doing the pulley conversion... Right now, the MR2 Spyder I drive has a hi-flow cat and a stainless steel dual muffler and has a heavenly sound of pop and burble when decelerating! To the original poster, if this is the accepted "safe" sound, enjoy it, good stuff!
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R50/R53 :: Hatch Talk (2002-2006)
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08-10-2015 03:31 PM