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Air escaping/blowing inside passenger area under acceleration(EU 2003 2.0 CRDI SF)

3K views 6 replies 3 participants last post by  fosfors 
#1 ·
Hi,

Searched the forum and could not find the issue I am experiencing currently.
My SF makes air escaping sounds and blows cold air through air vents in cabin when accelerating.
The issue becomes more evident under higher RPMs (around 1500 and up), there is some power loss over 3000 RPMs (however, I could not rule the power loss, as I am new to the car, especially diesel, coming over from BMW).
There is no turbo whining, cannot hear the air escape when idle, intercooler was checked and ruled as OK.
Has anyone had similar issue?
Could this be related to EGR, turbo vacuum hoses etc., as I am having trouble understanding why air is blowing inside cabin when accelerating.

Thanks a lot!
 
#2 ·
Could this be related to EGR, turbo vacuum hoses etc.
I don't see how air from the engine induction system could get into the heater vents, so I don't think the problem could be related to anything on the engine.

fosfors said:
I am having trouble understanding why air is blowing inside cabin when accelerating.
Yeah, that makes two of us. Does it do it if the car is stationary and you rev the engine or does the car need to be moving.
 
#3 ·
I don't see how air from the engine induction system could get into the heater vents, so I don't think the problem could be related to anything on the engine.


Yeah, that makes two of us. Does it do it if the car is stationary and you rev the engine or does the car need to be moving.
Hi,
Thank you for prompt reply.

The car does not do it when it is stationary, and not when revving, while stationary.
Only noticeable when driving, and pressing down on the accelerator pedal. Gets louder and stronger, the higher the RPMs and load.
Hardly can hear it when cruising.
 
#4 ·
Would you say the amount of air coming in is proportional to the speed of the car or the speed of the engine?

In other words, what happens if your traveling fast but come off the throttle? If you have a manual gearbox, dip the clutch so the engine returns to idle. Do you still get air coming through the vents at high speed when the engine is at idle?
 
#5 ·
I would say the amount of air blowing is proportional to throttle, not speed really. The more hardly I press the gas pedal, the more of the air sound.
As I have automatic gearbox, driving at high speeds (not accelerating - when engine is in idle) I don't hear the air sound, only when I press the pedal down.
 
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