Q: The car struggles to accelerate, and it stalled out last night before I shut the car off.

asked by on

My Lumina is struggling to accelerate and it leaves a bad smell when I'm done driving, I think it may be the fuel filter. I can barely go above 40 MPH and the car is sputtering when I'm stopped. It also stalled out on me right before I shut it off last night.

My car has 95000 miles.
My car has an automatic transmission.

What you are describing sounds like a dirty or faulty mass air flow sensor. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor. This sensor relays vital information to the ECM which uses this to make adjustments to fuel supply to the motor. A dirty or faulty sensor can cause an imbalanced air/fuel load to be supplied to the motor which results in an over fueling or under fueling situation depending on the conditions. This type of inconsistent fuel supply to the motor may cause a hesitation, loss of power, a jerking reaction, potentially a bit of black exhaust smoke and typically a strong smell of fuel when this sensor is malfunctioning. I would suggest having a professional from Your Mechanic come to your home to diagnose and inspect your vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. The car struggles to accelerate, and it stalled out last night before I shut the car off.

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: Q: Won't start

A number of faults can keep the vehicle from starting. Most commonly can be a lack of spark or lack of fuel. Lack of spark can be caused by anything from the crankshaft sensor not sending a signal to the...

Q: Q: Car shaking

Hello. This vehicle uses a center driveshaft support bearing (carrier bearing) on the rear driveshaft. This is a commonly known issue that I have seen go bad and cause vibrations around that speed. To confirm this, I recommend having a...

Q: I need some idea of why my car won't start?

A no start diagnostic performed by a certified mechanic will give you a definitive diagnostic based on your specific circumstance but broadly what you should look for is the following. First, make sure the gas is fresh. If old, it...

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...
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...
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...