bouncing speedometer

[mtbr64]

everytime im driving my speedometer will read the speed then all of a sudden it will start bouncing around from zero to 20 to 50 to 80 and back and forth. when im on the gas it wont jump it will climb up but when i let go it will bounce around.

whats going on/?

[9524tee]

i have the same problem with my tachometer , im curious also .

[Eternal_240Sx]

My best guess is that something is interfering with our signal... Check your wiring

[sepulchral]

i had same problem.... it was bad alternator fuse, check alternator, ur battery, and fuses

[SxMachine]

Check ur speedo sensor/ cable. One of em is prob loose.

[ryan hagen]

i had the same problem and it was theeth missin off my speedo gear, my speedo worked every now and then and it would bounce right before it would quit, i pulled the sensor to replace it and it was good just like 5 teeth were missing so it had a flat spot.