I decided I'm going to remove the big autometer tachometer my car came with and want to go back to the stock one, I'm guessing the tachometer filter is the cause of it not working now because there's a wire missing but should I check anything else? When the car starts the needle slight moves to around so I know it's getting power, would it be possible to solder the missing wire back on there?

It would if there is something to solder to.

If not - replacement tach filter - Rodney Dickman

http://rodneydickman.com/ca...h=21&products_id=165

$18.95 + $4.00 shipping