Problem with Electric tachometer

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Oct 31, 2005 | 07:02 AM

zamika0a

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Intermediate

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From: Dhahran

Problem with Electric tachometer

I have an 81 vette. original Electric tachometer. For some reason the tach pointer is past 7 and motionless. The input signal is there. I removed the input signal but the pointer is still motionless past 7. I disconnected the battery and the pointer is still on the other side of the scale. Any Ideas?

thanks

Oct 31, 2005 | 01:42 PM

G dad

Burning Brakes

Joined: Jun 2005

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From: THE OLDER I GET THE BETTER I WAS! NORTHERN ONTARIO

Most of the time it is the printed circut board....gone nutz...Eclkers Zip Corvette America all cary the part....you may also want to invest in a Tach filter to stop the spikes that kill Tach's

Oct 31, 2005 | 01:53 PM

70 LS1

Melting Slicks

Joined: May 2001

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From: Gig Harbor Wa

I would normally agree, but I think you emailed me about this earlier, and I haven't had a chance to respond. Is this an LS1 engine?

If so, the LS1 tach output signal is a 5V square wave signal with a frequency half that of a standard V8. Not sure what the tach board would do with this signal, but I bet it wouldn't work correctly. Your best bet is to use an aftermarket tach.

Oct 31, 2005 | 03:29 PM

zamika0a

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From: Dhahran

Quote:

Originally Posted by 70 LS1

I think you emailed me about this earlier, and I haven't had a chance to respond. Is this an LS1 engine?.

I e-mailed you from LS1 Tech. I wasn’t sure if you came around hear as often.

Thanks for the info guys. I think I’ll give the stock tach one more go with the kit from Zip before I get an aftermarket tach.