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Topic: 91' tach works when started and thats it

in Forum: C4 Electrical

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91' tach works when started and thats it

Posted: 11/28/10 4:44pm Message 1 of 2
scsjb02
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Joined: 11/23/2010
Posts: 17
When I start up my 91' the needle on my tach jumps up all the way up, and then drops all the way down.  From there it does not move at all.  Could this be a bad  tach filter?
 
Thanks for any help.



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91' tach works when started and thats it

Posted: 11/28/10 8:57pm Message 2 of 2
eddie20890
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lanoka harbor, NJ - USA
Joined: 3/22/2009
Posts: 1363
Vette(s): 1990 L-98 white/ red/black leather interior targa top auto 1975 L48 blue/black leather interior t tops auto
try disconnecting the filter and bypassing it, if it is the filter the tach should work. if it still doesn't work with the filter bypassed the i would think it would be the circuit board on the back of the tach.




















the dynamic duo

c3vr life member #97

in Forum: C4 Electrical


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