View Single Post
      09-27-2012, 09:40 PM   #23
ReyT
Second Lieutenant
3
Rep
249
Posts

 
Drives: BMW
Join Date: Aug 2012
Location: Aus

iTrader: (0)

Quote:
Originally Posted by pavo335 View Post
i thought the flapper was only closed on cold starts and once the engine warms up a little it is always open. When i start the car in the mornign yep nice and loud sitting in the drive (helps get the girls outa bed ) but half way to work sitting at lights quiet as stock???
pretty sure the flapper only opens on cold start and once warm only after certain RPM.

you should try a cold start with no cats and BMW PE... have to do the drive of shame out of my street lol..