Skip the auto shop - Our mechanics make house calls

Q: My engine rattles while idle and losing power while driving

asked by on

When my engine is idle the rev count drops and it sometimes has issues going up a hill like theres not enough power to make the climb. Also not able to reach full power while driving. My check engine light comes on constantly aswel

My car has 110000 miles.
My car has a manual transmission.

This is a common sign of a failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor. When this fails, this can cause an imbalanced air/fuel load to be supplied to the motor which often times results in the engine starving for air or fuel. This is what causes the hesitation or loss of power you describe. This can also cause the engine to struggle to idle for the same reason. I would suggest having a professional from Your Mechanic come to your home to diagnose the loss of power and replace this sensor as necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Q: Chirping sound when idling

It is possible that the belt has become stretched, and when the engine is running at lower RPMs such as idle, the belt will slip on the pulleys, causing the noise you are hearing. When the RPMs rise, due to...

Q: Sound system "hiss" when the car and radio are off

Hi there. Thanks for writing in about your 2011 Mini Cooper Countryman. The noise you are hearing likely is a design flaw on the stereo and speaker system as mentioned. Usually the bluetooth feature is what causes the hissing noise...

Q: I own a 2010 mini cooer engine locked

There are many possibilities for a stall/no start. I suspect that may be related to the oil change. You need to see if the oil is full and the oil filter is the correct one. If the engine locked up,...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.