Will this work for my tach?
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From: Itasca, IL
Will this work for my tach? Well for some reason, my computer is sending a tach output signal, so right now I have no tach. But what I was wondering is could I run a wire off the negatives of one of the coils and have that signal multiplied by 8 to get a relativly accurate tach? Is there any harm in splicing into one of the negatives on one of the coils? Will multiplying it by 8 be enough or will it need to be 16 (because you have to multiply the original tach output by 2 for the stock thirdgen tach to be accurate)? Thanks.
Chris
Chris
On The Tree
Joined: Sep 2004
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From: Woodland Hills, Ca
Originally Posted by 92CamaroReallySlow
Well for some reason, my computer is sending a tach output signal, so right now I have no tach. But what I was wondering is could I run a wire off the negatives of one of the coils and have that signal multiplied by 8 to get a relativly accurate tach? Is there any harm in splicing into one of the negatives on one of the coils? Will multiplying it by 8 be enough or will it need to be 16 (because you have to multiply the original tach output by 2 for the stock thirdgen tach to be accurate)? Thanks.
Chris
Chris
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From: Itasca, IL
I already have one...I wish I got the adjustable one, but o well. But what I was wondering is if thats ok to splice off the negative of a coil because the PCM is not giving out a signal. Thanks.
Chris
Chris
Joined: Sep 2004
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From: Downers Grove, IL
I don`t know if it would be ok to splice off the negative of a coil, but that was what I was going to try. Found out that I could just change tach output in computer though 
EFI live 7 Anyway I found a diagram in a alarm instruction manual of how to connect the tach input for the remote start to a individual coil engine. It used a diode for each coil to isolate all the coils but still provide the correct 8cyl signal to the tach. If you are interested in a copy of the diagram PM me your e-mail, can`t figure out how to attach it to the post. And the correct V8 tach signal for your tach is 4 pulses per revolution.
EFI live 7 Anyway I found a diagram in a alarm instruction manual of how to connect the tach input for the remote start to a individual coil engine. It used a diode for each coil to isolate all the coils but still provide the correct 8cyl signal to the tach. If you are interested in a copy of the diagram PM me your e-mail, can`t figure out how to attach it to the post. And the correct V8 tach signal for your tach is 4 pulses per revolution. Thread Starter
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From: Itasca, IL
Originally Posted by G-Body
I don`t know if it would be ok to splice off the negative of a coil, but that was what I was going to try. Found out that I could just change tach output in computer though EFI live 7 Anyway I found a diagram in a alarm instruction manual of how to connect the tach input for the remote start to a individual coil engine. It used a diode for each coil to isolate all the coils but still provide the correct 8cyl signal to the tach. If you are interested in a copy of the diagram PM me your e-mail, can`t figure out how to attach it to the post. And the correct V8 tach signal for your tach is 4 pulses per revolution.
EFI live 7 Anyway I found a diagram in a alarm instruction manual of how to connect the tach input for the remote start to a individual coil engine. It used a diode for each coil to isolate all the coils but still provide the correct 8cyl signal to the tach. If you are interested in a copy of the diagram PM me your e-mail, can`t figure out how to attach it to the post. And the correct V8 tach signal for your tach is 4 pulses per revolution.Hmm interesting...you have a PM.
