Q: My car revs it's rpms when at park and drives itself to 25 mph without pressure on the gas pedal

asked by on

So when I start my car up it spits and struggles to come alive, when I put it in park the car wants to rev up the engine and rpms, and when the car is in drive it drives itself slowly upto 25 mph without any pressure on the gas pedal. What could be the problem with that?

My car has 240000 miles.
My car has an automatic transmission.

This may be a sign of a failing throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. The sensor is usually located on the throttle plate so that it can directly monitor the position of the throttle. The ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when pressing the gas pedal. I would suggest having a professional from YourMechanic come to your home to diagnose your throttle control system.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My car revs it's rpms when at park and drives itself to 25 mph without pressure on the gas pedal

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: Every time I push the gas pedal, the car doesn't move fast

Hello. If the transmission is suddenly acting up like this and giving you this code then you may have gotten a defective transmission, or most of the time this is either related to the wiring or a control module problem....

Q: Truck is running rough, loses power, backfiring noise - 1994 Nissan D21

Hey there. I would check fuel pump output and condition of fuel injectors (flow rate and solenoid resistance). After that, I would evaluate the ignition system, including distributor, plug wires, timing. If you would like to have this checked for...

Q: Possible problem with my fuel pump or fuel filter.

What makes you think it is a fuel problem. I would need more information before I can help you diagnose the problem. The proper way to check for fuel issues is to put a fuel pressure gauge on the fuel...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...