Question about 2002 Jeep Grand Cherokee

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Tachometer is always moving - 2002 Jeep Grand Cherokee

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Well if your driving this is normal because it reads how many revolutions your engine is going like say how many revolutions per second.
If it's caused by driving or idling it's normal but if it moves up and down a lot while idling then there may be a problem with the timing.

Posted on Feb 06, 2010

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Posted on Jan 02, 2017

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RPM tachometer needle is erratic when the gas pedal is engaged


More than likely the tachometer is defective, the little motor that moves the needle is failing, this is called the "Stepper Motor" The cluster can be repaired, check online for repair sites, cost around $200.00 US

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I have a malfunctioning Tachometer. How it is fixed? What's the consequence of a malfunctioning tachometer? Thanks for your help.


this could be the tach meter itself. there is no bad consequence to driving it this way just annoying.

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My 98 explorerr wont move in drive and kicks hard but will move in reverse and all of a sudden my fluid level is showing at least 2 quarts to much


hot engine,cold or both>?
quarts? who a quarts gauge,
don't feel bad we had RCH , in the military. (xrated)
wont move is always 1 of 2 things.
1: engine stalled or almost no horse power (torque)
2: tranny MALF!

find out which first.? #1 fact to know.
for sure slush pump trannys that is always and issue.
slips too much, or too little, not in any manual gear box.
we know instantly when power is low (engine) every time.

my guess is engine power is near zero.
is idle below normal (800 hot)?
or too fast? idle?
evidence we need that. to wax smarter.
here is your first test:
1; start car select drive,or L, and step on gas (right foot)
2: does car move, sure no. but does RPM look right on engine.?
when the tranny slips the RPM rise and car dont move.
there is no longer a 1 for 1 relation ship engine to wheels
this is slip or as tranny men call it FLARE.
if you have no tachometer, then all this is hopless.
never drive a A/T with no Tachometer.
no way to communicate facts. see?
i have one in my drawer here,just for this case.
a mech, can do this by ear and is impossible to put in to words.

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Tachometerdoesnotstaystillent


The tachometer measures the speed at which the vehicle is moving. If the vehicle is moving the reading on the tachometer changes. I am sorry I may not have understood the question(?) because there are no spaces separating words.

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1989 honda prelude miles turn fine speed arm dont move whats the name of the mogule and where is it


If the miles turn fine and the speed arm doesnt move you have a problem with the tachometer this is refeered to as RPM,This get is signal directly at the ignition negaive part if the coil, If the connection at the coil is in good order a RPM gauge or Tachometer will be your solution

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There are usually two to three transmission sensors on most vehicles
sounds like it may have gotten damaged possibly hitting something in the road. You could take it to Autozone they may be able to help you locate the bad sensor. Or call them.

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The tachometer goes up and down suddenly when the car is moving slowly what is the problem ?


one of the tachometer cog slips.(probably cracked) have it checked and replaced.

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2005 Buick LeSabre tachometer not responding when engine is running. Tachometer stays on "0" when enige is running. Slight movement as acceleration increases; however needle barely moves as...


2005 BUICK LESABRE TACHOMETER DOES NOT REGISTER WHEN ENGINE IS RUNNING. SOMETIMES IT BARELY MOVES, THEN GOES BACK TO 0
SAME CAR HAD SPEEDOMETER QUIT, REPLACED WITH NEW SENSOR, DROVE ABOUT 1300 MILES AND IT QUIT AGAIN. CLEANED THE SENSOR, WORKS OK NOW.

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