75 Vette tach reading incorrect
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2nd Gear
Joined: Jul 2006
Posts: 2
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75 Vette tach reading incorrect
Hello,
Don`t see to many of these so I`m trying to shave a little time off diagnosing. I have a 75 vette with the tach reading approx 5,000 rpm at idle, slight acceleration sends the tach needle in reverse to approx 3000 to 3500. It appears that this had happened on a hard acceleration which may or may not have had anything to do with it. The tach filter has been changed and all connections checked. With the tach wire disconnected there is no tach, so, a signal is being sent. Any help with his situation would be greatly appricated. I`m thinking it may be the tach itself but I would like to make an accuate diag.
thanks
Dan
Don`t see to many of these so I`m trying to shave a little time off diagnosing. I have a 75 vette with the tach reading approx 5,000 rpm at idle, slight acceleration sends the tach needle in reverse to approx 3000 to 3500. It appears that this had happened on a hard acceleration which may or may not have had anything to do with it. The tach filter has been changed and all connections checked. With the tach wire disconnected there is no tach, so, a signal is being sent. Any help with his situation would be greatly appricated. I`m thinking it may be the tach itself but I would like to make an accuate diag.
thanks
Dan
