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: How do you avoid the upper and lower A arm bushings from melting on a 1970 GS 455?

Hi there - yes, this is a very large engine, in a moderately-sized place, with lots of heat transfer issues! As you suggest, heat shields, or wrapping the exhaust manifold (headers?) with "heat wrap" to keep the heat inside the...

Q: Where is the transmission speed sensor on a 2003 Pontiac Bonneville

Hi There, As you know, there are two speed sensors. One is an input speed sensor and one is an output speed sensor. These are both very different in terms of their location. The input speed sensor (which is what...

Q: Door won't stay open

Hello. It is possible that the key is still in the ignition when you are attempting to lock it. An intermittent door lock actuator could also be the cause of this problem. Additionally, your door handle not working could be...

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...
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...