BS3 and factory tach problem(99 trans am)

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Dec 28, 2010 | 03:47 PM

bluehawk2

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From: Tupelo, MS

BS3 and factory tach problem(99 trans am)

I am installing BS3 on a 99 trans am and I cannot get the factory tach to work.

I piggybacked the wires to the bs3 crank sensor.

I can read rpm on hptuners, but I cant get the gauge to read rpm.

The factory gauge cluster does work. I have voltage and oil pressure reading correctly

What am I missing?

thanks