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How do i make my tach accurate?

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Old 09-29-2008, 02:40 PM
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Default How do i make my tach accurate?
Does anyone know what i need to do to get my tach to work properly in my car?
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Old 09-29-2008, 10:59 PM
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Originally Posted by lsnova
Does anyone know what i need to do to get my tach to work properly in my car?

stock LSx PCM's output a 4 cylinder tach signal, so you need to set you're tach for 4 cylinder mode. PCM can also be programmed to change tach output signal to 6, 8 or whatever you need.
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Old 10-05-2008, 06:39 PM
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Might help if we knew what car and or tach you are working with.
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Old 10-06-2008, 12:30 AM
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Also, Dakota Digital makes tach adapters.

http://www.dakotadigital.com/index.c...rod/prd127.htm
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Old 10-06-2008, 07:25 AM
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I have the tach adapter from Dakota in my Volvo. It's NOT very accurate. Tach moves around quite a bit. Still it's better than no tach.
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Old 10-06-2008, 07:46 AM
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Lots of previous posts about no tach signal or a bouncing needle... put a 480ohm (or is it 680?) resistor inline with a 12volt wire. Run that to my signal wire on the tach and it should work perfect!!!!
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Old 10-06-2008, 03:36 PM
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Thanx i will try that!
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