Skip the auto shop - Our mechanics make house calls

Q: Rough idle, its "studdering when i accelerate"

asked by on

Hi random mechanic, I have a question about my car(2002 Ford Taurus V6 3.0 [8th vin # is a "U"])

Its symptoms: shuddering and lack of its complete horsepower when i drive/ idle the dash has a flashing "check engine" light when i accelerate, but is solid when i'm at idle.

I have replaced the following: All 6 spark plugs, wires, and the ignition coil.

What else can i do??

My car has 170000 miles.
My car has an automatic transmission.

A: Hi there. This may be a sign of a failing m...

Hi there. 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. If you would like to have this done, consider YourMechanic, as a certified technician will be able to come to your home or office to replace the 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: Loud noises when engine is cold

It is hard for me to determine the cause without a description of the sound, but engine mounts are a common issue on your vehicle and when bad, cause a heavy vibration sound especially at idle when the engine is...

Q: Broken brake line.

If you have a leaking metal brake line then it is most likely rusted out from salt and corrosion. I would not recommend trying to splice in a repair tube but to go from a connection to another connection and...

Q: Crank no start - 2004 Nissan Altima

Hello. Let's start with the basics: is the Check Engine light on, see what problem codes are set? The codes are your friend and this will make diagnosis much easier. Do you have spark at the spark plugs while cranking?...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...