Showing articles & questions for topic
revving

Related questions

Question
Would the throttle positioning sensor cause the engine to rev up while driving?
Your issues may stem from a variety of components. Have the vehicle scanned for diagnostic troubleshooting codes. This will give you more information on any issues the computer has detected. Some will not illuminate the Check Engine Light. The vehicle...
Question
high rpm when starting car, then idles very rough. Also lack of power accelerating at times while driving
These codes all point to the operation of the throttle position sensor. The throttle position sensor is a sensor used to monitor the throttle position relative to your foot on the gas pedal. The sensor is usually located on the...
Question
The car is revving but not moving properly
This may be related to a couple of different things such as low transmission fluid or a faulty transmission control module. As you may know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is...
Question
Dying when idling too long and whining noise while revving
Hey there. In many cases, whistling or whining noises can come from the belt drive system or a vacuum leak under the hood. Is your vehicle maintenance and tune-up schedule up to date? You may want to check the idle...
Question
While in park and stepping on the gas at 4000 rpm exactly the vehicles starts shaking.
The engine computer has a built in rev limiter built in to the programming that will not let the engine go above 3800 to 4000 rpms when the transmission is not in gear and driving down the street. This is...
Question
what would be the problem if the car starts and fail to move either forward or reverse and it revves itself when started?
Hello. If the van was moving fine prior to the wrong oil being put into the transmission then you may have a transmission failure. It the correct transmission fluid was not used then it can cause some serious internal transmission...
Question
At what RPM should my car be at while idling. My car is a 2000 Mazda 626 automatic.
Hey there. The specifications for the idle speed in gear for a 2.0 liter engine is 500 to 800 rpm. If you have a 2.5 liter engine the specifications are 550 to 750 rpm. Both of these rpm specifications are...
Question
In park, the engine just keeps revving.
Hello and thank you for contacting YourMechanic. There is an issue with the security system. The security is active and needs to be disabled. If the security is active, then the engine will act out and have a low rpm...
Question
RPM revs high
Hi and thanks for contacting YourMechanic. Check the IAC (idle air control valve) to the engine. This will cause the RPM's to fluctuate up and down to a dramatic amount. Look at the wiring to the IAC and make sure...
Question
Revs drop when steering is turned
You are correct on both actually. It is likely a failing power steering pump. When the pump binds up and creates an extra load on the drive belts. This puts the extra stress on all of the other components driven...
Question
Revs low when idle and falls when at traffic lights
Hey there. Even though you've cleaned the idle air control valve, that doesn't guarantee that the valve isn't still sticking or otherwise malfunctioning. You could try very gently tapping on the valve and see if that affects engine speed. The...
Question
Start up is okay. Blue smoke, rough idle, and stalling. Cannot rev motor. (2002 Nissan Elgrand)
The blue smoke is due to oil leaking into the combustion chambers. The cause can vary from fairly easy to fix worn out valve stem oil seals to more costly faults such as leaking piston rings or head gasket failures....
Question
It's not moving what's wrong?
Hello there, a few common faults will cause your 1994 Honda Civic to shut off when you push the gas pedal. The most likely faults are the fuel pump, shift linkage, Idle air control valve, fuel filter, vacuum leak or...
Question
When I get on the gas pedal my truck will rev then fall out but stay running
This can be caused by many different things such as low fuel pressure, dirty fuel injectors or potentially a failing fuel pump. As you know, the fuel pressure regulator controls the fuel pressure that the system maintains allowing the proper...
Question
Very rough idle goes away at speed. Can it be the cam solenoid?
Hey there. This may be related to a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds...
Question
My car revs it's rpms when at park and drives itself to 25 mph without pressure on the gas pedal
This may be a sign of a failing throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the throttle plate inside the throttle body in relation to your foot position on...
Question
Car revs when turning the key
Hello - yes, you probably need a new throttle position sensor. The symptoms you describe are classic throttle position sensor failure symptoms. I would recommend having a Throttle Position Sensor Replacement Service completed by a mobile, professional mechanic, such as...
Question
engine rev up and down on idle
This may be related to a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at...
Question
My car jerks when putting it into drive and sometimes has to be revved up high before going into gear
The issue you're describing is typically an indicator of an internal transmission component failure or loss of hydraulic pressure inside the transmission. The change of the motor and transmission mounts probably did not hurt the Honda's ability to accelerate correctly....
Question
The car idles fine. It revs up but slowly drops RPMs.
Hi there: The idle is controlled by the idle control valve, mass air flow sensor, and throttle body of a fuel injected motor. Any of these components could be dirty, damaged, or have faulty wiring that is causing your engine...

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