CLS55 AMG - What is this hose please?
- Thread starter GT3RS
- Start date
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Looks like maybe secondary air injection or oil breather system.
I would guess high fuel economy, maybe poor running especially idle and if it is oil breather then maybe a bit of vapour out the exhaust.
I would expect an engine light on as well
I would guess high fuel economy, maybe poor running especially idle and if it is oil breather then maybe a bit of vapour out the exhaust.
I would expect an engine light on as well
- Joined
- Nov 27, 2004
- Messages
- 4,800
- Location
- Southampton
- Car
- 65 Plate E350 CDI Convertible, 2006 CLS 55 AMG, 1997 C230K, 1999 C43/55 AMG
Hi,
That pipe is part of the secondary air injection system.
With this pipe off for any amount of time I would of expected the MIL light to of come on.
The fact it is not on more than likely indicates the engine didn't go through enough starting cycles to trigger it.
Refit properly and forget about it.
No lasting damage to engine to consider, indeed this system can be coded out quite easily if it becomes defective.
Quote from Pelicanparts web site:
"Secondary air injection is a vehicle emission control wherein fresh air is injected into the exhaust stream to allow for a more efficient catalytic converter. The air injection point is called the upstream injection point. When the engine is cold, air is injected upstream of the catalytic converter to clean up the extra-rich exhaust and raises the temperature of the exhaust to bring the catalytic converter to operating temperature quickly. Once the engine is warm, air injection is halted. This function usually only runs for a short time, when first starting the engine".
That pipe is part of the secondary air injection system.
With this pipe off for any amount of time I would of expected the MIL light to of come on.
The fact it is not on more than likely indicates the engine didn't go through enough starting cycles to trigger it.
Refit properly and forget about it.
No lasting damage to engine to consider, indeed this system can be coded out quite easily if it becomes defective.
Quote from Pelicanparts web site:
"Secondary air injection is a vehicle emission control wherein fresh air is injected into the exhaust stream to allow for a more efficient catalytic converter. The air injection point is called the upstream injection point. When the engine is cold, air is injected upstream of the catalytic converter to clean up the extra-rich exhaust and raises the temperature of the exhaust to bring the catalytic converter to operating temperature quickly. Once the engine is warm, air injection is halted. This function usually only runs for a short time, when first starting the engine".
