my 99 A4 is making a unusual engine noise

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12-18-2013, 10:10 PM

jjroberts191

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my 99 A4 is making a unusual engine noise

so it started about a week ago when i turn my heater on my engine drops idle for a couple seconds and i get a vibration in my steering wheel i think it might be my compresser what do yall think?

12-19-2013, 07:02 AM

M5S5

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Does the noise go away when the climate system is turned off?

12-20-2013, 06:20 PM

jjroberts191

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yes the noise goes away when i turn the heater off

12-20-2013, 07:14 PM

HBAudi

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Location: Huntington Beach, California

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Try using the heater without the air conditioning compressor engaged. If the noise is still not apparent, the air conditioning compressor or compressor clutch mechanism is most likely worn.