Buzzing Idle Regulator Valve

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Jambers
Posts: 62
Joined: Mon Aug 28, 2017 9:41 pm
Location: East Midlands UK

Buzzing Idle Regulator Valve

Post by Jambers »

Hi all, just a quick question.

With the ignition in "on" position (engine off) the Idle Reg valve makes a buzzing sound - is this normal?

The car has quite a lumpy idle, and I can find/see no obvious vacuum breaches.

I unplugged the connector and wiring to it and immediately, as you would imagine, stopped buzzing.
Current cars:
1989 635CSi Manual
2007 Z4M Coupe
G31 530d M Sport
F21 118i M Sport
Based in the U.K. Leicestershire
Previously : F30, E60, E21, E30, E12, E28
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hornhospital Online
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Re: Buzzing Idle Regulator Valve

Post by hornhospital »

How much, if at all, did unplugging the IAC (Idle Air Control) valve affect the idle? And, yes, they sometime hum (don't know the words? :wink: ). Some more than others. If it's really loud it's probably on it's last legs.
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
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