I drive a 97 Honda Accord EX V6 with 159k miles, since i've had the car its had a aftermarket tach because the factory tach does not work. Every now and then when i leave the house i notice that the tach jumps around a bit for only a few minutes and then it stops. Inspection is coming around and i need to get this fixed before then i got a few of other things i gotta fixed but first things first