travolta
New member
I have a 71, 351C with factory tach/funtioning gauges. I recently installed a mallory unilite 47 series distributior and petronix coil. I cannot seem to get the tachometer to accurately read the signal from the coil. The car idles at around 800-900RMP, but the tach reads at around 200RPM. When I rev the motor, the tach barely moves up to around 700RPM. I hooked my tach/dwell meter directly to the coil and it properly reads 800-900RPM at idle, so Im thinking the problem is somewhere between the coil and the tach. Any help or insight would be greatly appreciated.