Wheezing sound - Mercedes-Benz Forum
 
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#1 (permalink) Old 08-16-2009, 09:18 PM
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Wheezing sound

Hi all,

I recently did my regular do-it-yourself service on my 1997 E320 which included new air filter and a throttle body clean. Well, after an 800 mile round trip, I begin hearing a wheezing sound from the engine when accelerating. I do not think that this is "normal" so it got my attention. Has anyone ever had this to deal with? Is this something to worry about? What do you folks think?

97 Mercedes Benz E320
98 Volvo XC 70
87 Volvo 240 DL

Orlando, FL.
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#2 (permalink) Old 08-16-2009, 09:57 PM
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Mileage of your car?

Do you have the wheezing when you just rev the engine (i.e. car stationary)? If you do, check V-belt first and belt tensioner.

iluvJESUS
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Last edited by iluvjesus; 08-16-2009 at 09:59 PM.
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#3 (permalink) Old 08-16-2009, 10:08 PM
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Wheezing

Milage is 220,000+ and wheezing sound noticed when car is in motion primarily when accelerating.

97 Mercedes Benz E320
98 Volvo XC 70
87 Volvo 240 DL

Orlando, FL.
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#4 (permalink) Old 08-16-2009, 10:08 PM
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In addition to what IJL suggested, also make sure the duct to the throttle body is completely seated and the airbox fully closed as well.
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#5 (permalink) Old 08-16-2009, 10:10 PM
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NIghtcap,
Check your power steering fluid, while the car is running there should be little or no turbulence in the reservoir. another thing I can think of is maybe after your throttle cleaning service maybe a vacuum line fell off, but if it was a big enough one it would run rough. Hope this helps.

1996 C280
1997 S500
1994 S320 (Crashed and sitting, cant let her go)
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#6 (permalink) Old 08-16-2009, 10:15 PM
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Wheezing

Thanks guys, I will try your suggestions in the morning.

97 Mercedes Benz E320
98 Volvo XC 70
87 Volvo 240 DL

Orlando, FL.
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#7 (permalink) Old 08-17-2009, 08:55 PM
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Wheezing

I checked out everything as you guys suggested. I discovered that the wheezing (whistling) soung is coming from the throttle itself. There are no leaks that I have observed. I reved it up a few times and sure enough it is there. My indy did change the drive belt for me so I will take it to him to see if that has anything to do with it. Btw at idle I hear a rattle coming from the water pump area which leads me to believe that the belt might have something to do with it.

97 Mercedes Benz E320
98 Volvo XC 70
87 Volvo 240 DL

Orlando, FL.
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#8 (permalink) Old 08-17-2009, 10:06 PM
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Quote:
Originally Posted by NIGHTCAP View Post
I checked out everything as you guys suggested. I discovered that the wheezing (whistling) soung is coming from the throttle itself. There are no leaks that I have observed. I reved it up a few times and sure enough it is there. My indy did change the drive belt for me so I will take it to him to see if that has anything to do with it. Btw at idle I hear a rattle coming from the water pump area which leads me to believe that the belt might have something to do with it.
Then you need to check the water pump, bear in mind that problem with the belt tensioner could cause that too. So I would check that also. You may ask your mechanic to clean your throttle body for you or you DIY with a carb cleaner.

iluvJESUS
"I am the Alpha and the Omega," says the Lord God,
"who is, and who was, and who is to come, the Almighty." Revelation 1:8
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#9 (permalink) Old 08-18-2009, 07:25 PM
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Thanks, I will my indy check out everything.

97 Mercedes Benz E320
98 Volvo XC 70
87 Volvo 240 DL

Orlando, FL.
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#10 (permalink) Old 08-23-2009, 09:19 PM
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Checked everything out and all seems OK except for that whistling sound. My indy mechanic seems to believe that it is because it is breathing better. Still confused.

97 Mercedes Benz E320
98 Volvo XC 70
87 Volvo 240 DL

Orlando, FL.
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