Tach reading double - Team Camaro Tech
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post #1 of 3 (permalink) Old Apr 21st, 09, 01:38 PM Thread Starter
Join Date: Apr 2009
Posts: 2
Tach reading double

I have an 89 IROC, 5.0 with and automatic. Car runs great, but the tach is reading double what the engine is turning. It is also idling high, maybe 1200 rpm while cold.

Any ideas.
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post #2 of 3 (permalink) Old Apr 21st, 09, 04:59 PM
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Join Date: Mar 2002
Location: Austin, TX, USA
Posts: 5,277
Re: Tach reading double

Is this an OEM tachometer or aftermarket. If aftermarket, make sure it's not on the 4 cylinder setting.

68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #3 of 3 (permalink) Old Apr 22nd, 09, 07:53 AM Thread Starter
Join Date: Apr 2009
Posts: 2
Re: Tach reading double

sorry, factory tach.
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