Showing articles & questions for topic
RPM (Revolutions Per Minute)

Related articles

P0508 OBD-II Trouble Code: Idle Air Control System Circuit Low
P0508 P0508 code definition When this code appears and is stored in the onboard computer, it means that the idle air control system circuit is low. What the P0508 code means The P0508 code means that the powertrain control module...
How to Monitor Your RPM Gauge to Get the Best Performance Out of Your Car
A car tachometer, or RPM gauge, shows the speed the engine is spinning. Watch your RPM gauge to improve your car's performance and fuel efficiency.
How Long Does a Throttle/Accelerator Pedal Position Sensor Last?
The The throttle/accelerator pedal position sensor detects the position of the accelerator pedal. This information is then transmitted to the vehicle’s computer - the engine control module (ECM). From there, the data is then sent from the computer to the...

Related questions

Question
Very low rpm
Hi there. From the description you have given, I believe you are stating that your vehicle has no power, and you are only able get to 35-50 mph and nothing over 1500 rpm. You also stated vehicle runs great, which...
Question
Sluggish acceleration
From the description provided, it appears that you are experiencing transmission problems when accelerating your Mini Cooper. There can be a variety of reasons for this to happen, such as low fluid, a failing shift solenoid or even internal damage...
Question
RPMs idle low
You should make sure that the timing belt and water pump job were done correctly and are not the cause of the other issues you are having. Then the other problems can be checked out if not related. I recommend...
Question
RPMs going up and down
This is most likely caused by a faulty Idle Air Control valve (IAC valve). This valve regulates the speed of the engine's idle by creating a controlled vacuum leak in the intake manifold. It is also possible that there may...
Question
RPM revs too high
Hi, thanks for writing in. This is a sign of a failing idle air control valve. This is a unit that is located on or near your intake manifold that monitors the air intake as it is mixed with fuel...
Question
RPM problems
Hi, thanks for writing in. This may be related to couple of things such as a vacuum leak or potentially an improperly adjusted throttle plate screw. When a vacuum leak is present in an engine, it can cause an imbalance...
Question
RPM goes up and down
The very first thing to do when you experience power loss or surging issues, or interesting gauge readings, is have your vehicle scanned for diagnostic troubleshooting codes. Your car can set these codes and not always illuminate the Check Engine...
Question
RPM fluctuates
With the age and mileage of your vehicle, it would probably benefit from a throttle body service including cleaning the idle air control valve. Over time, oil and carbon build up on the throttle blade so it does not sit...
Question
Revs up and out of control
Hello. The throttle cable could be sticking causing the RPMs to increase excessively if the throttle cable is holding the throttle open when it shouldn’t be. There also could be a bad throttle position sensor or idle control unit. These...
Question
Misfire
Hi there. From the description you have given, your vehicle has a combination of problems. The erratic tachometer/rpm gauge could be at fault. The tachometer signal from the ignition module could be erratic and may also be the cause of...
Question
Low RPMs
Hi there. This is a common problem for your vehicle. There are many different things that can be effecting your idle rpm. The Idle Air Control Valve for your Vanos needs attention. Vanos is the variable valve timing BMW incorporated...
Question
Idle speed too high
The idle speed may be elevated due a a large vacuum leak. When unmetered air has entered the engine, the vehicle may try to compensate by adding fuel. The extra air and fuel translate to an increased idle speed. Have...
Question
Gauges not working
Hello. If only your tachometer and speedometer aren't working, the problem is probably with the instrument cluster itself. This is because these two gauges use completely different inputs. The speedometer gets its signal from the vehicle speed sensor (VSS), whereas...
Question
engine revs up and down when in park
The idle is controlled by the idle air control valve and if it cannot keep the engine idling it will keep trying to rev the engine up to compensate. A vacuum leak, sensor that has failed, or an EGR system...
Question
Cold engine problems
There are numerous potential causes for the problem you are having. One thing that comes to mind is a failed engine coolant temperature sensor (ETC). The ECT does exactly what it sounds like - it monitors engine temperature. The ECT's...
Question
Car not changing gears
The transmission will most likely need to be replaced. I do not suggest driving the vehicle in this condition as serious engine damage will occur if the engine is redlined too much. A certified mechanic from YourMechanic can visit your...
Question
Car not accelerating
Hello, in your particular vehicle the RPMs and gas pedal are controlled electronically. The accelerator pedal position switch sends a signal to the ECU which sends a signal to the throttle position sensor. The throttle position sensor controls the opening...
Question
Car has trouble shifting between gears
As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission solenoid, which directs transmission fluid into the valve body to engage the correct gear. When...
Question
Cannot shift into overdrive
On the SC300, when the shifter is in the 3-D position if the shifter is to the right, then the over shift function is enabled. Once the engine reaches a combination of speed and load the transmission will automatically shift...
Question
2011 Ford Taurus RPMs drop when windows are rolled up
A slight drop is RPMs is normal. The windows are operated by an electric motor, which draws from the alternator. As for the gas gauge, that's probably normal, too. I'm assuming you're calculating your fuel range manually, using the trip...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.


Ask a question