Skip the auto shop - Our mechanics make house calls

Q: Gas pedal hard to apply, can't go past 55 mph

asked by on

My car starts right up and idles well. The problem I've been having lately with it, is that the car doesn't seem to have enough power while running. It accelerates hard and cannot run past 55 mph. It is as if I drive with the brakes applied, as if it doesn't get enough fuel. The car is revving rather slowly and when I apply the gas pedal, it is hard to press. Eventually, the car picks up speed and runs well with no misfiring or shaking, but only to a certain speed. What might be causing this?

A: Hello. It sounds like the transmission isn’...

Hello. It sounds like the transmission isn’t shifting gears properly. A problem with the first, second, and/or third gear can cause difficulty with acceleration. Another possibility is that the catalytic converters are clogged causing poor acceleration. When this happens it may be difficult for the car to go over a certain speed. Have a certified technician, like one from YourMechanic, complete an inspection of the acceleration problem to determine what fixes will help.

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: Failure to catch or switch gears, belts turning and car has power ect, but won't switch into any gears. Transmission/engine fluids are ok.

Hi there. I have seen this same concern while I was employed at a Toyota dealership. This sounds like the transmission has failed internally; most likely the internal brake band, solenoid, or valve body has failed. The transmission will ultimately...

Q: brake booster and master cylinder

Your first step is to verify that the parts you purchased are EXACTLY like the ones you removed. It is possible to have a a similar component fit but have the wrong clearance for the brake pedal pushrod. If they...

Q: Lack of power

I think a good place to start would be to remove the aftermarket cold air system and put back the stock air filter and intake. I'd recommend using some throttle body cleaner to clean out your throttle body. Also, use...

Related articles

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...
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.