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Kirkham Motorsports

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  • 1 Post By Bulldog

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  #1 (permalink)  
Old 05-21-2022, 07:11 PM
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Cobra Make, Engine: 302. 1992 build
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Default Tach

Hey guys my cr gauges are starting to go bad had to replace oil pressure a few days ago. Now I noticed the tach is acting up how is the best way to check it out.
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Old 05-22-2022, 02:30 AM
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Hi Mike, long time no hear. Hey, I have a (NOS) set of CR gauges, 'I'll make you a deal you can't refuse' for the whole set. I ended up with a vintage set of VDO's. Give me a call, we'll work out the shipping, Cheers Tom.
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Old 05-22-2022, 06:27 AM
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Even though you only set it once, the 4-6-8 cylinder switch on the back of the tach (if your tach has one) can be problematic over time. Work it back and forth a few times to clean the contacts.

Tachs often get there ground through the mounting bracket. Make sure it's not loose and clean it can help.
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Old 05-22-2022, 11:29 AM
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Don't know what type ignition system you've got. If you have an MSD system, check your ignition system output to the tach. The tach output on my MSD 6AL box is supposed to be 1-5 VDC, motor idling, output wire disconnected. The output of the tach adapter fed by the 6AL output should be 2-3 VAC. The output of the tach adapter should be disconnnected from the tach for this measurement. All this checked out in my car, so I replaced my tach, which fixed my problem.
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Old 05-22-2022, 02:37 PM
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Thanks guys appreciate the info.iwill do some checking and see what I can come up with iwill give you a call Tom, can always get some good advice on the forum.
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Old 05-27-2022, 01:00 PM
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I have a set of gauges i won't be using either
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