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Re: high idle

At 07:35 AM 8/19/97 PDT, you wrote:
>Gday fellow Audi fans
>Since I replaced the idle micro switch in my '91 90 the idle has heen   
>doing OK.
>Except ...
>As the engine warms up, around 10 to 15 minutes from initial start, the   
>revs increase from 800 to 1000 RPM. The increase happens in stages not   
>all at once. Would anyone know what might be causing that.
>I read in recent posting low voltage can cause high revs, how is that?
>What should be the correct voltage supplied to battery from alternator,   
>and how much should it drop when for example lights are switched on etc.
>My car is a manual, FWD.
>Any help will be welcome.
>/\/\ark Z\/0LANEK
Having just overhauled my alternator this weekend, I can say that the
voltage should be 13.8V.  At full load, i.e. lights and A/C running voltage
@ the battery was 13.4 volts.  BTW, the voltage reading on the Channel 11
meter was indicating 12.2 volts at the same time, so its not entirely
accurate-use a real meter to measure voltage.


Tony Lum
Fremont, California U.S.A

Audi Owner/Operator/Mechanic by Necessity ;-)

1987 5000S Turbo Quattro
1985 4000CS Quattro
1980 5000S Sedan