Q: Loss of power at 40 to 50 mph.

asked by on February 19, 2017

Just bought car ssanyong rexton 270 deisal drove 135 miles runs fine until you slow down gets back up to 40 takes ages to get off 50 no power

My car has 100.000 miles.
My car has a manual transmission. 2005

Check the throttle pedal position sensor on the gas pedal and see if the wiring is loose or pinched. If the wiring looks good and is not damaged, then I recommend replacing the sensor. If you need further assistance with your vehicle loosing power after letting off the gas pedal, then seek out a professional, such as one from Your Mechanic, to help you.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I adjust the power liftgate?
The power liftgate has three modes: 1. OFF. In this mode, the power liftgate is deactivated, and the trunk can only be opened manually. 2. MAX. In this mode, the power liftgate is activated, and the trunk will open to...
Engine howling.
Hello. If the engine seems to run fine under normal driving conditions and only makes this noise when you let off of the gas then this may not be an engine problem. Most of the time it is either a...
How do I turn on the automatic exterior lamps?
The exterior lamp control is placed on the instrument panel, to the left of the steering column. To turn the exterior lamps to the automatic setting, rotate the control knob clockwise one notch, to AUTO. When the exterior lamps are...
Car rattles after starting
Hi. It's difficult for me to say without hearing the noise firsthand, but there are a couple things that come to mind. The first is the hydraulic valve lash adjusters. The lash adjusters use oil pressure to keep the lash...
Brake light stays on
Hi there. Sounds to me that you have a malfunctioning brake switch. This brake switch, over time can deteriorate causing it to not function properly. You can have a mechanic sent by YourMechanic diagnose your brake lights (https://www.yourmechanic.com/services/brake-light-is-not-working-inspection) to determine...
how much is an average price to replace all 4 brake systems on a 2005 Honda Pilot?
The cost depends on exactly what must be done to restore braking performance on your vehicle to like new condition. For example, when installing new brake pads, such MUST be done at the same time that the brake rotors are...
Power steering and overheating
Hi There, This may be related to a failing power steering pump (https://www.yourmechanic.com/services/power-steering-pump-replacement) or low power steering fluid (https://www.yourmechanic.com/services/power-steering-fluid-service) levels. As you may know, the power steering system uses a pump, normally driven by a belt. The pump supplies pressure...
Fuel Vapor Leak Detection Pump on a 2014 Chrysler 200 at ???
Hi there. The EVAP detection pump on most Chrysler's are located under the driver-side rear wheel well. To access and properly remove it, I would highly suggest purchasing a service and repair manual for your vehicle.

Related articles

Symptoms of a Bad or Failing Oil Temperature Sensor
If the temperature gauge gives false readings or does not move, you may need to replace the oil temperature sensor.
How Long Does an Electronic Spark Control Last?
The The job of the electronic spark control is to control the engine timing. This part can also be called the "knock sensor", as it monitors any unusual knocking, or vibration that may be happening in the engine. This is...
How to Replace a Car Battery Temperature Sensor
The battery has a battery temperature sensor that can fail if the Check Engine Light comes on, the battery voltage is low, or the RPM curve surges.