07-31-2013, 10:25 AM #1
strange whoosh + overboost ... hard to explain
while driving to work today, i noticed something off w/ car.
i was doing runs last night and the car was working flawlessly (cobb S1+aggST)
note: i have ER chargepipe w/ tial bov.
so, if i accelerate and quickly let off gas, there is a whoosh sound (not bov sound) as if it was not venting properly. immediately following the sound, i notice that rpm's bounce upward for a second as if overboost was forcing way into the combustion process. sorry but the issue is very hard to describe.
i attempted to log but couldnt get anything reliable on way to work. no codes thrown. will try to get some reliable logs tonight.
i plan on checking vacuum lines and bov tonight and see what i can find.
anyone have experience w/ any issues like this? any ideas?
07-31-2013, 10:41 AM #2
Do you get a "shove from behind" type feeling as well? As if the car wants to keep accelerating after you have let off the accelerator pedal?2011 E90 M3 \ Melbourne Rot Metallic
07-31-2013, 10:49 AM #3
07-31-2013, 11:02 AM #4
07-31-2013, 11:05 AM #52011 E90 M3 \ Melbourne Rot Metallic
07-31-2013, 11:29 AM #6
07-31-2013, 07:04 PM #7
08-01-2013, 09:33 AM #8
and, as you said tune related. doesnt happen after cobb uninstalled.
08-01-2013, 10:25 AM #9
@nelsonmg, doesn't sound familiar, but i also don't have DCI which is known to be more "vocal."2011 E90 M3 \ Melbourne Rot Metallic
08-01-2013, 10:55 AM #10