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Topic: strange one

in Forum: C3 Electrical


strange one

Posted: 2/14/07 8:42am Message 1 of 5
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engine starts and runs ok, turn it off,remove key and tach creeps up to 1500 rpm on dial. any ideas????


1979 Corvette
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strange one

Posted: 2/14/07 8:59am Message 2 of 5
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Frederick, MD - USA
Joined: 9/8/2003
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Vette(s): 1969 convertible L71 427/435 4-speed black interior
That's normal for a C3 with an electronic tach, not a mechanical one. I don't know what year you have but it sounds like it.

Some of your other gauges likely return to their last position as well.



strange one

Posted: 2/14/07 9:32am Message 3 of 5
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79.
woo that had me wondering
 



1979 Corvette

strange one

Posted: 2/14/07 5:19pm Message 4 of 5
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As soon as you go to turn the key to start it it will return to zero.


strange one

Posted: 2/14/07 8:43pm Message 5 of 5
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
I agree wid 'Slinger, and Mike...the electronic tachs will do that. I've noticed the other gauges will do as 'Slinger says, too, go to a "not what you would expect for key off" reading. It has to do with the resistance of the gauges, I think, and the need for power(12v) to "zero" them. Later cars don't do this.
Ain't 'lectrical stuff just too neat?!


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in Forum: C3 Electrical


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