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

asked by on September 08, 2016

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?

Catalytic Converter Replacement $279.51 - $3103.51 Get a Quote
Car is slow to accelerate Inspection $79.99 - $89.99 Get a Quote

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.

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

What others are asking

97 SL 500 putting new relay in for a fuel pump getting no power to the fuel pump

There is no shut off switch. If you desire, a certified mechanic dispatched by YourMechanic can perform an electrical component/circuit diagnostic and find and repair the interruption. Such a diagnostic relies on the factory wiring diagram of the circuit and...

after replacing spark plugs and wires engine light still come on should i replace the O2 sensor as diagnose suggested if so which

Hello. If the scanner indicated the O2 sensor was bad, I would recommend replacing. The oxygen sensors are located in the exhaust system of the engine, and they sense the oxygen content of the exhaust gases. There should be two...

I can hear the grinding sound when I stop and drive again.

Hello. The symptoms you describe are commonly associated with worn brakes. When the brakes are applied, the brake calipers compress the brake pads against the rotors to slow the vehicle. Over time, the brake pads and rotors will eventually wear...

Transmission acting up causing car to shake and loose acceleration.

Hello, with a fault like that there is a good chance that a code has been set in the traction system, transmission, and engine control. A scanner will need to be connected to check the system. The most likely cause...

Speedometer jumps car moves slow

If your speedometer needle or gauge is jumping up and down while the vehicle is moving at a slower speed, two possible issues may have occurred. Either the whole instrument cluster has failed at some point preventing the speedometer from...

Input turbine speed sensor B has stopped working

Hello and thank you for your question. It sounds like the input turbine speed sensor B has failed or lost connection to the engine control module (ECM). You will first need to check the wiring to the sensor and see...

The car pulls to the left after it gets warmed up

Hello! I believe the problem you are having may be to do with the electric steering system. I would suggest having that checked out by a capable technician. Also you mentioned that the alignment has been done. Compare the readings...

My car surges forward after I hit the brakes

There seem to be a number of these complaints popping up, though there haven’t been any verified repairs made. Your best course of action is to take the vehicle to the local Kia dealer (as this may be a warranty...

What does the parking brake on chime mean?

The parking brake on chime sounds when you begin to operate the vehicle while the parking brake is engaged.

Related articles

Why Do Brake Rotors Warp?
Brake rotors are the large metal discs visible behind the wheels of a car. These spin along with the wheels so...
How Long Does a Power Brake Booster Last?
When When you press the brake pedal, your car slows down and eventually stops. Most of us put little more thought into it. We know that our brake pads need to be replaced periodically, and we’ll probably need to have...
The Best Used Cars to Buy If You're a Skier
When When summer ends, skiers start thinking about hitting the hills, and that means having to contend with winter driving conditions. Not just any vehicle is going to get the job done. We have evaluated several used ski-worthy vehicles, and...