No tach signal
04-19-2017, 02:59 PM
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Join Date: Feb 2015
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No tach signal Hey since I finished my swap in to my 87 gta trans am my tach worked for a couple day and then just stopped. I had two 10k resistors on the tach signal output wire form the pcm to my stock tach wire in the car. The tach just stopped working just like that. I tried hooking up two different after market tach nothing works. I hooked up my obd2 scanner and it shows the rpms. So Ecu is getting signal out not putting out any signal. Any ideas?
