how true are afc readings?

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wildacexxx
Posts: 500
Joined: Thu Jan 13, 2005 6:17 pm
Car: 2002 Q45 nav sport

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i just installed my afc and its telling me that im idling at 500 or so rpm but on the cluster it says 800. which should i believe?

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Tartan
Posts: 434
Joined: Thu Feb 27, 2003 8:00 pm
Car: 89 240sx

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Think of the cluster gauge as a smoothed out rough estimate.
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wildacexxx
Posts: 500
Joined: Thu Jan 13, 2005 6:17 pm
Car: 2002 Q45 nav sport

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so while the afc is reading 400 to 500 rpm at idle and the cluster is reading 800 is that rite?
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Tartan
Posts: 434
Joined: Thu Feb 27, 2003 8:00 pm
Car: 89 240sx

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Well I know mine is almost 250 rpm off from teh cluster
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green91
Posts: 71
Joined: Thu May 04, 2006 2:54 pm
Car: s13

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do you have the correct # of cylinders setup in your afc?
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wildacexxx
Posts: 500
Joined: Thu Jan 13, 2005 6:17 pm
Car: 2002 Q45 nav sport

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i got the rpms working rite. it was the cylinders.
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