Skip the auto shop - Our mechanics make house calls

Q: Car lacks power on acceleration and stumbles at highway speed

asked by on

My car is having major problems. It won't properly accelerate and the car jerks while trying to accelerate. It also hesitates while accelerating and when I have to accelerate hard smoke comes out of the exhaust. All the problems seem to be even worse at higher speeds. Can you tell me what the problem could be?

This vehicle and engine has a list a mile long of various engine, cooling, computer, transmission, fuel and other possible problems that could contribute to causing the problems you are having. My best recommendation is to have a mechanic test the vehicle and diagnose the problem after examining the fuel pressure, computer and ignition system for any problems. The diagnosis will need to be thorough in order to isolate the cause of the problem. A certified mobile mechanic from YourMechanic can diagnose any acceleration problems at your home or office.

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

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!

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: Loss of engine power when driving over 50 mph

Check for problem codes, even if the Check Engine Light is not illuminated right now. There are likely transient codes still set. This may be something simple like a fuel supply issue (fuel filter clogged, fuel pump relay contacts burned,...

Q: I start the car it shuts down but only run if my foot on gas if it's not on gas cuts completely off

A few different things will usually cause the car to start and then die. A bad ignition coil can cause this if it is beginning to fail, resulting in intermittent starting problems. A dirty or faulty mass air flow sensor,...

Q: transmission fluid bubbles over the dipstick any help?

This is caused if air is introduced to the fluid. For example, air can get into the filter inside the transmission pan or may be introduced if the fluid is too low or too full. If you just had...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.