Question about 2008 Jeep Commander

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Car rpm goes up and down - 2008 Jeep Commander

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Throttle position sensor

Posted on Mar 30, 2011

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1 Answer

On my 2005 F/expdn, if I am on red light stop, when rpm goes under 50 x 1000 my car shutdown. If I keep it above 50 by pressing accelrator is OK, pl suggest


1st your car should not idle below 110 rpm even in gear

idle problems on these are caused by both broken or open vac ports or a dirty throttle body the A/F ratio cant get a correct reading

Feb 18, 2015 | 2005 Ford Expedition Eddie

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Toyota corolla hatch 2002 idle at 2000 rpm when


All the above is normal , except 2000rpm is a little high at idle . can be adjusted down to 1500rpm. the computer adjusts the engine speed . in drive the transmission loads up the engine idle drops to 1000rpm . in park engine unloaded rpm increase all normal.

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I have audi A6 2.4 model 2006. When I start the car in morning, the battery sign appears after a couple of seconds. But when I accelerate a bit it goes away. The normal position of the rpm should be about...


Afraid not. Although the light goes out it still may not be charging very little charge will put the light out. the other reason I feel it's the alternator is instead of rpm increasing it should decrease as a properly charging alternator should pull the engine which should decrease the rpm

Aug 10, 2014 | Cars & Trucks

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When i shift car from P to R or D the rpm suddenly goes to zero and then suddenly goes to approx 2000 rpm.


that should not effect the driving of the car,it's do to the loss of connection in the gear shifter.

Dec 20, 2012 | Cars & Trucks

1 Answer

My 99 maxima car rpm goes up and down olny when i hit 2,000rpm's and will not go over 45 mph what could be wrong with it ?


If your driving along light on the gas & as the transaxle
shifts or later the tach or rpm flairs up,then the transaxle
is slipping

There is no fix for that ,other than having it removed & rebuilt

Need a trans repair shop for that

Sep 13, 2012 | 1999 Nissan Maxima

1 Answer

The car jerks at 70 and 110 kmh


i got the same issue with my car ,it goes away if i down shift and bring up the RPM, my question is would injectors cleaners help in this case ??? please help

Aug 20, 2012 | 1991 Cadillac Fleetwood

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MY RPM goes up and down. My brother's car is a ford Thunderbird V6 4.6 engine '94model is experiencing some problem. I change the spark plugs, the battery wires, check the gas pressure. But when I...


Have you tried testing to see if the Oxygen Sensor is bad? The other issue I've seen with Fords is the IAC (Idle Air Controller) goes bad and they constantly surge up and down.

Apr 04, 2011 | Ford Thunderbird Cars & Trucks

1 Answer

The rpm go up an down


Change your coolant temperature sensor for the computer.(not the one for the temperature gauge).They are located one beside the other,under the distributor cap.The parts supplier will know which one you need.When you start the car cold it usually idles 1800 to 2000 rpm for a minute or so and as the resistance starts to decrease,the rpm drops.after a couple minutes the rpm goes to 1000 rpm.People that are in the habit of driving the car right away at 2000 rpm are putting a huge stress on the axles,and find that they are replacing them every 100000 km.It also wears out your brakes faster .When the sensor goes bad,it causes a fluctuating idle .

Dec 30, 2010 | 1998 Honda Accord

2 Answers

RPM problem


Check and lube the Idle Air Control (IAC) valve,

This tiny electric motor is mount on top valve cover and close to the accelerator cable.

The function of IAC motor is to idle up the RPM when more load is added.

Example: A/C on,light on,stop light on and radio on.

A stuck IAC can be free by few soft tape on the body of the motor.

To lube the worm gear,you will need WD-40 to free up the old grease and lube white lithium grease.

Clean the electrical contacts with CRC electric part cleaner.

This electric motor is very expensive.

Please handle it with care.

Dec 08, 2009 | 1998 Suzuki Esteem

1 Answer

Problem when i turn my car on


check coolant in radiator or censor on outlet housing,

Jun 09, 2009 | 1992 Honda Accord

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