engine shaking during idle
Thread Starter
Super Member
Joined: Oct 2012
Posts: 503
Likes: 6
From: New York
05 E55
engine shaking during idle
I replaced my engine and transmission mounts recently so they can't have went bad already but I'm getting a shake from the engine again when the car is a idle and I even felt my car slightly jolt forward when cruising any experience this before or have a idea whats going on?
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Do you notice the RPMs varying when it shakes? If so, check to make sure the engine cover (air filter housing) is seated properly. If that's good, then check the intake ducts for cracks - mine were literally crumbling and the hot air from the engine bay was causing some poor performance.
Thread Starter
Super Member
Joined: Oct 2012
Posts: 503
Likes: 6
From: New York
05 E55
Do you notice the RPMs varying when it shakes? If so, check to make sure the engine cover (air filter housing) is seated properly. If that's good, then check the intake ducts for cracks - mine were literally crumbling and the hot air from the engine bay was causing some poor performance.
Super Member
Joined: Mar 2010
Posts: 684
Likes: 14
From: Lebanon
2007 BMW 550i
Interesting Check engine light! Rodney is most probably right with his suggestion. To make sure its seated correctly you could push it down from each corner and make sure there is no movement, or you could remove it and reinstall to make sure (remove the front intake ducts, they pop into place, and then pull the engine cover up and it will pop right up). I dont know how big the 550 engine is, maybe to be able to lift the engine and reach the motor mounts your mechanic removed plastic piece that connects the throttle body and the air filter housing (forgot its name) and installed it incorrectly (not sealed).
Thread Starter
Super Member
Joined: Oct 2012
Posts: 503
Likes: 6
From: New York
05 E55
Interesting Check engine light! Rodney is most probably right with his suggestion. To make sure its seated correctly you could push it down from each corner and make sure there is no movement, or you could remove it and reinstall to make sure (remove the front intake ducts, they pop into place, and then pull the engine cover up and it will pop right up). I dont know how big the 550 engine is, maybe to be able to lift the engine and reach the motor mounts your mechanic removed plastic piece that connects the throttle body and the air filter housing (forgot its name) and installed it incorrectly (not sealed).
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Super Member
Joined: Mar 2010
Posts: 684
Likes: 14
From: Lebanon
2007 BMW 550i
Aha system rich. Your car is putting too little oxygen/too much fuel in your bank 1 (either right or left bank of your engine, not sure). What could cause that is a couple of issues.
1. Fuel injector might by damaged.
2. Your Air filter Box is not correctly in place.
3. That plastic piece i told you about (MAF sensor) might need cleaning or is out of place.
4. A Break in your manifold, or manifold gasket.
5. Vacuum line break.
Maybe also a couple of issues. I'd look into finding a STAR diagnosis unit and doing more tests to pinpoint the issue. Also you could remove the air filter housing and use a bottle of water and drop water into where the intake manifold enters the cylinder housing from the top and look for any change in engine behavior(either turn off or shakes erratically). A general inspection of your vacuum lines will be easy when you have the air filter housing off.
1. Fuel injector might by damaged.
2. Your Air filter Box is not correctly in place.
3. That plastic piece i told you about (MAF sensor) might need cleaning or is out of place.
4. A Break in your manifold, or manifold gasket.
5. Vacuum line break.
Maybe also a couple of issues. I'd look into finding a STAR diagnosis unit and doing more tests to pinpoint the issue. Also you could remove the air filter housing and use a bottle of water and drop water into where the intake manifold enters the cylinder housing from the top and look for any change in engine behavior(either turn off or shakes erratically). A general inspection of your vacuum lines will be easy when you have the air filter housing off.
Last edited by DanielFD; May 8, 2015 at 01:48 AM.
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MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
Make sure the air pump intake hose is connected to the engine cover/air filter housing. Also, to check that the cover is seated properly, just run your fingers under the back lip of it where it sits on top of the MAF sensor to make sure there are no gaps.
Thread Starter
Super Member
Joined: Oct 2012
Posts: 503
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From: New York
05 E55
the air filter housing wasn't on properly thanks guys
Junior Member
Joined: Jul 2014
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From: Katy Texas
2004 clk500 cab
Make sure the air pump intake hose is connected to the engine cover/air filter housing. Also, to check that the cover is seated properly, just run your fingers under the back lip of it where it sits on top of the MAF sensor to make sure there are no gaps. __________________
--
- RODNEY
Can you send a photo of this connection I done recall seeing a hose connected to the housing when I changed filters.
--
- RODNEY
Can you send a photo of this connection I done recall seeing a hose connected to the housing when I changed filters.
