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?

A: This vehicle and engine has a list a mile l...

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: When my car gets warm and I stop at a light or stop sign it shuts off only after car get warmed up I've changed a few things but

Hi There, It sounds like you may have a failing ignition coil. The 15-20 minute gap in between when you are able to start your car sounds like something called heat cycling. This happens when ignition coils begin to fail...

Q: 80% clyinder leakage on all cylinders

Sixty PSI is pretty low. Be sure the throttle is blocked open during testing as a closed throttle will artificially reduce the readings. If your compression gauge is accurate and the leak is not through the valves or rings, that...

Q: Engine not starting when gas filled up

What I think is going on here is what is referred to as a "hot soak". Under most circumstances, a person is either starting their car when it is cold, or they have gone into a store for a...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...