Tach reading wrong

[renovatdkitchen]

So today while going on my second drive with the car this year, I noticed that my Tach is not having a good time. At idle, it reads just above 0, yet link gives me a proper reading. While driving, the clutch will chatter when coasting, and if I disengage the transmission, the car often stalls. The only thing I have changed, is put a evo 8 timing map on the ECU. I have tried going back to the 2g map, but it didnt have any effect.

I tried searching and didn't notice anything that closely resembled my problem.

Thank you in advance.

So I just fixed it. Turns out it was a coil pack wire shorting on the intake manifold. *wipes sweat from forehead*