TOYOTA MR2 INSTRUMENT CLUSTER GAUGE

When Reving Or Driving, At Around 2k To 3k Rpm Tach Needle Jumps And Car Hesitates. At About 4k Rpm Its Smooth. I Have Not Checked Anything...

I Just Bought This Car. The Previous Owner Just Replace The Ignition Coil And The Tachometer And Speedometer Does Not Work.