This started happening this morning on the highway going 65 mph. The RPM hand started to jump between 2400 and 2900, inconsistently. I did not notice any change in acceleration or idle or speed. It just suddenly started the jumping. After slowing down to 55 the rpm hand came down to 2000 rpm and settled down. I have seen speedo jumping in other vehicles before, but not the rpm hand. On a cold idle situation the hand jumps between 600 and 400 rpm. It's like seeing a clock (sec) hand going clock and counter clock wise at the same time.
Any idea anyone? Any info is much appreciated...
Any idea anyone? Any info is much appreciated...