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AFC tach not working

Old 10-23-2008, 12:00 AM
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Default AFC tach not working

So after installing a apexi neo, everything works but the tach. I ran the wire from the afc to the - side of coil and now in it jumps around alot rpm wise. It goes from actual rpm to something really high, i.e. i am reving at 3 it is reading 5. I set the number of cylinders in it and I got everything else right (I think). What am I missing?

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Old 10-23-2008, 12:40 AM
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Default Re: AFC tach not working

the only advice i have for you id to get rid of the neo
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Old 10-23-2008, 12:50 AM
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Default Re: AFC tach not working

Originally Posted by 87-prelude-si
So after installing a apexi neo, everything works but the tach. I ran the wire from the afc to the - side of coil and now in it jumps around alot rpm wise. It goes from actual rpm to something really high, i.e. i am reving at 3 it is reading 5. I set the number of cylinders in it and I got everything else right (I think). What am I missing?

Secondary circuit backfeed. Find an actual tach signal, not the coil.


Oh, and AFC is fail. Chuck that ----.
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Old 10-23-2008, 11:21 AM
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Default Re: AFC tach not working

Originally Posted by Hitchhikkr
Secondary circuit backfeed. Find an actual tach signal, not the coil.
The ground side of the injector works every time.

I love how the SRT-4 guys buy MSD Tach adapters to run AFCs. :1
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Old 10-27-2008, 05:21 AM
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Default Re: AFC tach not working

i hope it was the blue wire at the coil....
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