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04-23-2015, 08:31 AM
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#1 |
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Registered User
Join Date: Sep 2013
Location: Waverly Tennessee
Posts: 22
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factory tach problem
My factory tach is connected to a 396 with an HEI ignition system but the tach reads on the low side. If you disconnect and reconnect the plug on the tach it appears to read normal for a few seconds and then goes on the low side again. Any thoughts?
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1971 C-10 Short Bed |
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04-23-2015, 09:25 AM
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#2 |
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Registered User
Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,186
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Re: factory tach problem
Is the tach for a 6 cyl or v8? Should be stamped on the back side.
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04-23-2015, 03:50 PM
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#3 |
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Registered User
Join Date: Mar 2011
Location: Elizabethtown, Kentucky
Posts: 322
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Re: factory tach problem
I had a similar issue and added a tach filter. But as stated above, make sure it's correct for V8 for I6
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Thanks, Casey  71 Chevy C-10 SWB 350/400 PS, PB The Build http://67-72chevytrucks.com/vboard/s...d.php?t=584045 The Brake Upgrade http://67-72chevytrucks.com/vboard/s...d.php?t=695699 |
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04-23-2015, 04:00 PM
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#4 |
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Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
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Re: factory tach problem
Or, clean out the tach filter. it may have R.P.M. dirt in it.. sorry, I couldn't help myself.
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Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
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