Skip the auto shop - Our mechanics make house calls

Q: Throttle

asked by on

my car was jerking one night, and the "change oil" light came on, so i got an oil change. after a while, the car jerking repeated once again, and the rpm's were in the red. now that i let the car sit, it's finally back at rest at 0, and at below 1 rpm while idling, i drove it around the block, hit 50 mph and the throttle seems to reset just fine. is my car safe to drive?

My car has 140000 miles.
My car has an automatic transmission.

A: This may be a sign of a failing mass air fl...

This may be a 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 YourMechanic come to your home to diagnose and replace the mass air flow sensor.

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: Code P300. Tried fixing with no success.

When you receive the OBD code P0300, it means your Buick LeSabre is experiencing a random misfire. This code is given because one or more of the engine’s cylinders are misfiring. While our first instinct is to think spark plugs,...

Q: My steering wheel will only go into a upright position and lock it won't go back down. Do you think this is the faulty way GM stee

Hi there. On your 2002 Cavalier, there are multiple components that must all work together to allow the tilt function to work correctly. The most common component that becomes damaged and only allows upward tilting is the pivoting section as...

Q: Traction control warning comes on all the time

This issue should be covered by a recent GM special service bulletin 14636 that will replace your throttle position sensor and pedal assembly. The bulletin is dated April 8, 2015. Make an appointment with your local dealer and they will...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...