Skip the auto shop - Our mechanics make house calls

Q: Car hesitating while accelerating

asked by on

So, I just purchased a vehicle. Runs seemingly fine but have noticed a bit of a lag when accelerating while I'm already moving at a low speed (like going through a yield sign). When I put a little pressure on the gas it hesitates then surges a bit. From a stop the car accelerates normal. Any ideas? Thank

My car has 63000 miles.
My car has an automatic transmission.

It sounds like you may have a fuel supply problem in getting the proper amount of fuel to the fuel injectors which may be caused by a bad fuel pump or potentially faulty fuel injectors. This can happen when the pump itself is not working properly or when the fuel pressure regulator is not maintaining the proper fuel pressure in the fuel system causing the engine to starve for fuel. This can also happen when there is insufficient connectivity to the fuel injectors which can cause an intermittent fuel spray pattern into the intake system resulting in a lean fuel condition or the motor otherwise starving for fuel. I would recommend having an expert from YourMechanic come to your location to diagnose your fuel system.

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: Clutch lost all hydraulic pressure after difficulty engaging gears while using the clutch.

Hello. This situation is usually a failure of either the clutch master or slave cylinder - they simply wear out. If you have any clutch fluid on the drivers side front carpet, the failure is the clutch master cylinder. If...

Q: 2006 Subaru Legacy GT moonroof tilt won't close

It is likely that there is something that is jammed in the gears or the tracks of the sunroof. If the switch and motor are working properly, a mechanical malfunction is likely the only thing that could cause any issues....

Q: right passenger door will not unlock, why?

Hello, thank you for writing in. Will the door unlock with the key, or manually from the inside? If not, then it may be having an issue with the locking mechanism. Accessing it manually is done from the inside of...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...