V6 but what year? OOPS, you DID say it's a 95... sorry.

1995 V6 & a couple years after that, the tach signal comes from the coil. If you can find any loose/dirty wire connections, fix them first.

At some point before 1998 the tach signal comes from the ECU.

Just for other people reading this, the 4-cyl tach signal comes from the ignitor up to 1997 or so.