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  #1  
Old 02-13-2006, 08:10 AM
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Join Date: Jul 2003
Location: CT
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1995 E320 humming throttle actuator

While retrieving codes last week, I noticed a significant amount of noise coming from the throttle actuator (directly under the plastic air intake) when the ignition was turned to the on position but the car was not running. It's a high-pitched squeal that changes pitch slightly when the gas pedal is depressed. The noise is constant....it also changed pitch when the codes I retrieved were being erased. I don't recall hearing this before. Is this normal or indicative of a faulty actuator or one that is on it's way out?

Thanks. Brian
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1995 E320 wagon
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  #2  
Old 02-15-2006, 05:23 PM
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Bump

Anybody with a M104 HFM (93-96 3.2L) could you help me out and turn the key to the run position (don't start the car), pop the hood and listen for noise around the intake manifold? I'd appreciate any help.
Thanks! Brian
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1995 E320 wagon
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  #3  
Old 02-15-2006, 07:22 PM
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Join Date: Jun 2004
Location: Bentonville
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On my E320 car, there is a constant buzz from the vicinity of the throttle actuator with the ignition on and the car not running. I'd say it sounds like a fuel pump. It does not change sound when the accelerator is pressed. I do not have EA on my car.
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Paul

2008 R320 CDI
1995 E320 Wagon (Sold)
1987 300TD
1987 300SDL
1986 560SL (Sold)
1972 280SE 4.5
1984 300SD (Totaled)
1983 280SE (Totaled)
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1972 280SEL 4.5 (Sold)
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  #4  
Old 02-15-2006, 07:27 PM
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Thanks for checking, Paul!
Brian
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1995 E320 wagon
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