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Tach Not Working

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Old Aug 17, 2015 | 06:48 PM
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From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Default Tach Not Working

Has a read out for a couple seconds upon starting but then just reads zero.
Changed tach filter and didn't help. Suggestions Please?
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Old Aug 17, 2015 | 07:32 PM
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Originally Posted by Cruisinfanatic
Has a read out for a couple seconds upon starting but then just reads zero.
Changed tach filter and didn't help. Suggestions Please?
And I don't recall the year of your car. I'd use a scanner and check at the ALDL maybe for the first check. The couple second intermittent is I'd say something of an unusual. An '89 or earlier maybe the intermittent isn't that uncommon.

Is the filter you used new or a used part? If an early car is it the graph or the digital display, maybe both that have the same intermittent?

Last edited by WVZR-1; Aug 17, 2015 at 07:46 PM.
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Old Aug 17, 2015 | 09:33 PM
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Originally Posted by WVZR-1
And I don't recall the year of your car. I'd use a scanner and check at the ALDL maybe for the first check. The couple second intermittent is I'd say something of an unusual. An '89 or earlier maybe the intermittent isn't that uncommon.

Is the filter you used new or a used part? If an early car is it the graph or the digital display, maybe both that have the same intermittent?
I have an 85. Both displays read zero. The filter was a new one given to me by a member
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Old Aug 18, 2015 | 02:25 AM
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Originally Posted by Cruisinfanatic
I have an 85. Both displays read zero. The filter was a new one given to me by a member
I've no idea how I overlooked the "1985 Original Owner" tag because I look to the left always. There's one go to guy where you need to take your question. I'd confirm the ALDL output with a scanner and then make request to BATEE ...

The FSM of course has only a single test for the tach, if it doesn't pass the 54MPH test (best I recall), you replace cluster.
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Old Aug 18, 2015 | 06:48 AM
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Unfortunately I only have a code reader
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Old Aug 18, 2015 | 09:52 AM
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Default New to the forum 1990 needs lots of TLC

my tach does nothing, need to find a video or step by step written post on fixes. Thanks
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Old Aug 18, 2015 | 10:35 AM
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Originally Posted by VonHulk
my tach does nothing, need to find a video or step by step written post on fixes. Thanks
Your '90 is a different arrangement and I'd suggest some searches for '90 tach issues. This thread will NOT help you at all.

Originally Posted by Cruisinfanatic
Unfortunately I only have a code reader
Surely you know someone that can check for you. I'm guessing you have several acquaintances that could accommodate you. How about an old tach/dwell meter? If yes I'd maybe check beyond the filter BUT the intermittent if it's a consistent error certainly hints cluster. A call to/email to BATEE I'd say is inevitable.

Last edited by WVZR-1; Aug 18, 2015 at 10:41 AM.
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Old Aug 18, 2015 | 11:46 PM
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Originally Posted by WVZR-1
A call to/email to BATEE I'd say is inevitable.
I believe Bryan has an '85, so he would definitely be a good person to contact.
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Old Aug 19, 2015 | 11:27 AM
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Originally Posted by Cliff Harris
I believe Bryan has an '85, so he would definitely be a good person to contact.
member here? I can't find
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Old Aug 19, 2015 | 11:57 AM
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Originally Posted by Cruisinfanatic
member here? I can't find
Byian A Thompson is BATTEE

http://www.batee.com/corvette/dcrg/repair/
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Old Aug 19, 2015 | 12:37 PM
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video of what it does. Does same 2700 reading with key turned on

Last edited by Cruisinfanatic; Aug 19, 2015 at 12:52 PM.
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