Q: Why is my car is real slow to accelerate?

asked by on

Why is my car real slow to accelerate? It hesitates to accelerate when I hit the gas.

My car has 156200 miles.
My car has an automatic transmission.

This may be related to a few different things, such as low fuel pressure, dirty or faulty fuel injectors or potentially a dirty or failing mass air flow sensor.

Low fuel pressure can cause the injectors to not receive the proper amount of fuel to be supplied to the cylinders. This is regulated by the fuel pressure regulator. 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 results in an over fueling or under fueling situation depending on the conditions. This can cause 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 resolved, a certified professional from YourMechanic can come to your home or office to diagnose the acceleration problem.

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
  1. Home
  2. Questions
  3. Why is my car is real slow to accelerate?

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: Do wranglers normally shift at high RPM when accelerating fast on first gear?

Hi There, If this is something that generally only happens when the vehicle is still cold, this may be normal. Many newer automatic transmissions have temperature-sensors in them that, on a stone-cold start, restrict normal shift to only the lower...

Q: Ignition coil pack is not firing (1 out of 3)

It is not uncommon for an ignition coil to fail. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeated as the copper beneath them expands and contracts much quicker than...

Q: Misfire on my engine and I am getting an injector code 27. (OBD1)

Hi there. The injector output driver is not responding properly to the control signal. Check the wiring from the computer to the injector driver. If the noid light is flashing erratically, then the controller (computer) is not functioning correctly. You...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.