Skip the auto shop - Our mechanics make house calls

Q: Accelerating doesn't produce increase in RPM

asked by on

I'm having trouble with my car occasionally not accelerating. Stepping on the accelerator produced no increase of RPM or speed and my mechanic said it read 900 and stayed there. (Fortunately it showed up for him.) When this happens, maximum speed is 25mph. Yesterday, I had been parked for 3 hours and then started it, which did fine, but then pressed on the accelerator and it produced normal RPM. Is the problem an accelerator linkage?

A: The throttle opening is controlled by the e...

The throttle opening is controlled by the engine computer and if the computer sees a problem in the system it will limit the throttle opening. You need to have the computer tested to see the codes that can cause this. The problem will cause the computer to go into failure management mode and limit the throttle body from going over just above idle until the problem goes away or is fixed. In your case it must be an intermittent problem and will need to be isolated and repaired.

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!

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: Traction control off, Stabilitrak, and reduced engine power

Hello. The sensor you had replaced previously may still be the cause of your issues. There is likely something in the circuit that is causing the premature failure of the sensor. Test the sensor the same way you did before,...

Q: Engine burns oil on a '97 Integra

If it's running rich, it can easily flood the engine out and cause it to burn oil. So I would work on that first. But that said, realize that the only thing you are testing the engine compression is the...

Q: RPM's are higher than normal on gear changes

Hello. It may be possible that the computer is programmed to delay shifting when the vehicle is cold, in order to help warm up the vehicle faster. Once the vehicle warms up, however, shifting should return to normal. If the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.