dennis m

there is a lead off the dist. for the tack it goes to a electrical component the size of a aa battery its mounted on the transmission bolt this is a 90 cor. auto is it a noise suppresser or what. cant find it in manuals do I need to go to gm thanks

s carter

The component you are talking about is the Tachometer filter

https://corvetteparts.com/catalog?q=tach+filter

aklim

Just to smooth out the signal. I would remove it by bypassing it and seeing what happens. If the tach doesn't work still, the problem is elsewhere. Maybe your gauge or a broken wire.

xrav22

Put it back on

dennis m

ill. Try bypassing lt

dennis m

thank you so much one end has a wire pulled out

Joe C

search "tach filter" within the C4 forum. here's a start...

https://www.corvetteforum.com/forums...ch-filter.html