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Discussion Starter · #1 ·
I'm new to this list, so if this question has been covered, please refer me to the previous area. <p>I recently purchased a 1997 850 with about 90,000 miles on it. It runs great with one exception--when the car starrts, it revs to about 1600 rpm for about 5 seconds, then falls to 1,000 rpm. It idles at about 1,000 thereafter. <p>It seems like the initial rev would be hard on an engine just developing oil pressure. Also 1,000 rpm seems like a high idle speed. <p>How is the idle speed set on this model short of replacing the idle air controller? The set-screw and the shaft in the linkage do not seem to be constraining the movement of the throttle linkage.<p>Much thanks in avance.<p>Tom Capehart
 

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Re: 1997 850 idle (tom850)

Normal
 

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Re: 1997 850 idle (tom850)

Welcome to the board Tom <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0"> <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/embeer.gif" BORDER="0">
 

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Re: 1997 850 idle (1sciroccofahrer)

I know it has been a while since I had my '97 855 but I thought idle was below 1000, closer to 750 to 800?
 

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Re: 1997 850 idle (Kaizai)

I will carefully observe today and report back to you
 

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People on other forums are posting that the speedo on many 850's aren't very accurate, and claim that to really see true speedo a computer or laptop hook-up is necessary with appropriate software. Just a thought. My previous 850 sat right at 800. My S70 sits at about 950.
 

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Re: (MadeInJapan)

950-1000, whatever. these TACHS,<B> (NOT speedos</B>) aren't that accurate and could easily be off by 100, even 200 rpms
 

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oops, I didn't mean speedo....I meant tach....foggy here lately...the mind is....LOL. Thanks for the correction, JRL.
 

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Discussion Starter · #9 ·
Re: 1997 850 idle (tom850)

Thanks much for all the helpful replies. I thought about the tach accuracy but my old Sears dwell meter/tach has settings for 4-6-8, no 5 cylinder! I'll look into updated equipment. <p>Tom
 

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Re: (JRL)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JRL</b> »</i></TD></TR><TR><TD CLASS="quote">950-1000, whatever. these TACHS,<B> (NOT speedos</B>) aren't that accurate and could easily be off by 100, even 200 rpms</TD></TR></TABLE><p>The first tach in my 850 was fine at an idle, off by a 1000rpm @ redline.<br>
 

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for the past three years that i've owned my 94 855t, even in the dead of cold winters, when i start the car, it'd get to 900rpm or whatever and just sit there. but this past week, it started to go up to 1600 for a second before falling down to 900. never seen that happen before. any idea what's going on? i know it's normal for this to happen but given the past three years, this is abnormal.
 
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