Skip the auto shop - Our mechanics make house calls

Q: My truck rpm is going down while I accelerate

asked by on

Hello , I have a question , my truck starts shaking when I accelerate the gas (my truck is on park) also the Rpm goes down when I press the gas , I have it on (park) and when I press it takes a long time to accelerate. , the truck doesn't turn off. Can anyone tell me what it could be ?
My car has an automatic transmission.

Hi There, It sounds like you are describing the symptoms of a failing throttle position sensor. The throttle position sensor monitors the throttle position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. Based upon the inputs from the sensor reading your foot’s position on the pedal, 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 Your Mechanic come to you home to diagnose and inspect your vehicle.

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!
  1. Home
  2. Questions
  3. My truck rpm is going down while I accelerate

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: How do you use the blind spot mirrors?

Your car may have blind spot mirrors rather than standard side view mirrors (they’re optional equipment). If it’s so equipped, you have an important advantage when attempting to see vehicles to the side and behind, such as when you’re changing...

Q: Check engine light was on and then the car won't turn on at all, it's a 97 camry le with 186k miles

If you request a no start diagnostic the responding certified mechanic will get the problem diagnosed and repaired for you promptly. The fact that the check engine light has come on may mean that key clues are available to speed...

Q: Getting code P0446

The code P0446 is most likely due to an inoperative evaporative vent solenoid that will need replacement. The rear axle leak will need to be inspected to see where the leak is for a repair needed. If the rear cover...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...