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

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: SUV slowed from 60 to 40 mph and lost acceleration

Diagnostic codes can be somewhat transient. If the engine management system observes the problem clearing after several drive cycles, it will turn off the Check Engine Light and clear the problem code. There is no "history file" kept. There are...

Q: starter not turning over and is not big engine is a 360

You will need to see if you are getting signal to the starter relay near the battery. This relay will activate the starter solenoid on the starter. The starter motor may stick if you hear it clicking but not turning....

Q: My acceleration is very poor

This can happen for a variety of reasons, however what is most commonly associated with the symptoms you describe is a faulty throttle position sensor. This is a unit that monitors the position of your foot on the gas pedal...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...