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That's called the tachometer. You didn't provide much information, but maybe it only happens when you (or the automatic transmission, if you have an automatic) shift gears. If that's the case, it's normal. Shifting to a different gear at any given speed changes the RPM's of the engine. If it happens at times other than when shifting, something else is wrong.
What else can I help you with?
What could cause oil pressure gauge on a 2004 Grand Jeep Cherokee to fluctuate?
It goes up while driving and down when you're idle....that's normal
My oil gauge keeps falling to zero while I'm driving what would cause this?
Check the level of the oil in your engine. If it's ok, then you must have a faulty gauge.
What could cause a noise from tires while driving?
You could have blown your tire or it could have gone flat.
What could cause your 1997 Tahoe to turn off while driving?
Simple answer is the alternator
What could cause shaking of wheel while driving?
Tire out of balance is the most likely cause. Can also be a bent wheel.
Could a corroded negative battery connection cause your car to stall while driving?
Yes
What 3 gauges should be checked often while driving?
Speedometer, fuel gauge, and temperature gauge.
What causes a cars rpm to suddenly jump while driving?
What can cause the RPM on a car to jump while driving is a problem with the transmission. It could be a problem with the gears in the transmission itself.
What might cause engine to cut out while driving 1989 Mitsubishi galant?
could be the timing belt
Your 2002 expedition dyed while you were driving it and it wouldn't restart you dont think it was getting a spark what could cause this?
could be coil
Why does my 1996 gm diesel truck fuel gauge goes up and down while I'm driving?
Most likely cause is a failed sending unit in the tank.
Is it illegal to touch cell phone while driving?
Some jurisdictions don't allow to be talking or texting while driving because it could cause accidents. You will have to check your local laws.
