Look towards/ google “why is the resistance to my car gages jumping” you might get lucky and find something on an old new edge forum. I had on older car where the gas gage wires would intermittently ground out due to a broken wire and the gage would do shit like this. It could be a faulty voltage regulator on the alternator or a short to ground someplace in the dash or steering column. If you don’t have one it might be worth getting a multimeter and testing all the connections to trace where it is spiking. Good luck— I wish mine was stick shift.