Skip the auto shop - Our mechanics make house calls

Q: The car accelerates with delay

asked by on

Hi. My car has around 115,000 miles on it. When I try to accelerate, it takes a longer time than usual to increase the speed. It would happen at lower speeds. If I drive at 30 mph and give it gas, there is no acceleration until I apply the gas pedal to the ground and keep my foot on it for a longer period. I took the car to the dealer and they said everything is okay after hooking a scanner to it. What could cause this? Thanks.

Hi there. This can be caused by a number of things. Since the dealership installed a scan tool and didn’t see any codes then it must not be a sensor failure. I typically start by checking the back pressure of the exhaust to see if the catalytic converter is failing. If it is fine then I check the fuel pressure as a weak fuel pump will cause this. If that is also fine it may have a dirty mass air flow sensor. These are all the most common causes of this. If you want to have this fixed, consider YourMechanic, as a certified mechanic can come to your home or office to check it out.

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

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: Service messages coming up

The systems would have to be tested for codes and the wiring checked to the components that are showing problems for terminals to wire connector problems. The terminal crimps may not be making good contact. The wire would need to...

Q: My gear when in park doesn't allow ME ro take my key out I have to push up real hard to take out the key..

Hello, thank you for writing in. We need to determine if the key is getting stuck in the ignition cylinder, or if the shifter is not registering as being in park. First, make sure nothing is stuck in the way...

Q: Power steering

This may be related to a failing power steering pump or low power steering fluid levels. As you may know, the power steering system uses a pump, normally driven by a belt. The pump supplies pressure as it is turned...

Related articles

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...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.