Tach sits at 500 RPM when off

WE3RX7 · 12-02-2008, 01:29 PM

I dont believe there is a "reset" option honestly for the tach. If it happened during the starting incident you referred to above its possible something did get "wacked" out. Do you have an extra tach laying around? I'd tap it into the tach wire coming into the ECU (the blue/yellow wire) and make sure that the signal going TO the tach is correct before manually breaking down the cluster and resetting the needle.

However, a simple though is that if the tach is electric (gets an electric signal from the ECU) and you disconnect the battery and the tach still sits at 500 w/ no power going to it at all - that it is probably just out of wack for whatever reason and will probably just need to be manually pushed back down, lol...

12-02-2008, 01:29 PM	#5
WE3RX7 RCC Addict Join Date: Feb 2008 Location: VA Posts: 1,812 Rep Power: 19	I dont believe there is a "reset" option honestly for the tach. If it happened during the starting incident you referred to above its possible something did get "wacked" out. Do you have an extra tach laying around? I'd tap it into the tach wire coming into the ECU (the blue/yellow wire) and make sure that the signal going TO the tach is correct before manually breaking down the cluster and resetting the needle. However, a simple though is that if the tach is electric (gets an electric signal from the ECU) and you disconnect the battery and the tach still sits at 500 w/ no power going to it at all - that it is probably just out of wack for whatever reason and will probably just need to be manually pushed back down, lol...