Q: The car idles fine. It revs up but slowly drops RPMs.

asked by on November 16, 2016

Isles fine revea up fine but when it goes down to lower the rpm it drops very slowly

My car has 140000 miles.

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 idle to be inconsistent. In order to determine which one or combination of all of them possibly is the root source of your Ford’s issues, it’s best to have a mobile mechanic, like one from YourMechanic, come to your location to complete an engine idle is rough inspection.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Engine is vibrating at drive condition while AC is on though compressor, condenser, chamber changed.

Check the vehicles engine mounts. A failed engine mount may cause extra vibrations from the engine to make their way through the car and become very noticeable. Check your service history as well to be sure your maintenance is up...

Transfercase won't engage into 4lo.

You should first lock in the front hubs and try to move forward in 4hi and then put it in neutral and shift to 4lo. It may take a little move forward and moving shifter to lock it in. My...

Loss of engine power when driving over 50 mph

Check for problem codes, even if the Check Engine Light is not illuminated right now. There are likely transient codes still set. This may be something simple like a fuel supply issue (fuel filter clogged, fuel pump relay contacts burned,...

Related articles

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...
Can a Bad Sensor Prevent a Car From Starting?
If your car isn't starting or has a hard time starting, a faulty sensor may be to blame. Car sensors monitor data to keep your car running smoothly.
2011 Dodge Ram vs. 2011 Ford F-150: Which One Should I Buy?
Large trucks can be fun to drive, and even more fun to get dirty. Unfortunately, they may also cause you to get phone calls from friends who need to move into a new apartment. Fortunately, just having a truck may...