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: Car overheats while not moving or moving very slow.

Hello. A temporary "hotter than normal" behavior like your are describing is likely to be a failed radiator fan switch. The switch (and fan) should power up when the engine temperature is hotter than normal - such as low air-flow...

Q: What should I do with my car,junk or keep it?

The way I look at it if it was my car is, would the car be worth more than the cost to repair it completely after the repairs are done. If the cost of the repairs would exceed 80% of...

Q: How can I get my car to start when the theft system won't allow my key to turn over?

The security chip is designed to keep your vehicle from starting without the owner's key. Unfortunately, you will need to obtain a key with a chip and have it programed to the vehicle. A mobile locksmith may be able to...

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 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...