herrickmky
New Member
- Joined
- Apr 1, 2015
- Messages
- 7
- Car
- W124 300CE-24
Hi,
I've just bought a 92 300CE-24. Once the engine is started, I hear "hee-hee" from the central console. It turns out coming from the air flow speed switch - the left dial in the following picture:
I get it out
As you can see there are 2 nozzles that connect to 1 vacuum tube in green and 1 vacuum in red. The green one is with negative pressure.
On the other end of the nozzle (behind the piece of metal, there are two hair-thick hole getting through to the nozzle. When engine starts, air is sucked through the hair-thick hole to the green tube and causes the loud "vee-vee-vee"
Just wonder any idea if that "vee-vee-vee" is normal?
Any what is the purpose of connecting the air flow switch to the vacuum system?
PS all pictures borrowed
I've just bought a 92 300CE-24. Once the engine is started, I hear "hee-hee" from the central console. It turns out coming from the air flow speed switch - the left dial in the following picture:
I get it out
As you can see there are 2 nozzles that connect to 1 vacuum tube in green and 1 vacuum in red. The green one is with negative pressure.
On the other end of the nozzle (behind the piece of metal, there are two hair-thick hole getting through to the nozzle. When engine starts, air is sucked through the hair-thick hole to the green tube and causes the loud "vee-vee-vee"
Just wonder any idea if that "vee-vee-vee" is normal?
Any what is the purpose of connecting the air flow switch to the vacuum system?
PS all pictures borrowed
