Skip the auto shop - Our mechanics make house calls

Q: The rpm drops when stopped. It feels like it wants to die then catches to normal, it will do this a couple of times.

asked by on

No check engine light is on, and my Verizon Hum isn't picking anything up either. I have replaced the crankshaft sensor, spark plugs, battery, PCV valve and it still does it. It also has a problem starting when the temperature is between half and 0 degrees. Nothing else is wrong with the car, perfect condition. I just can't figure out the drop in rpm when stopped. And it starts doing it when it's warmed up. There is hesitation when I press the gas after the rpm drops too. Any advice would be appreciated, thanks.

My car has 80000 miles.
My car has an automatic transmission.

Hi, thanks for writing in. I would recommend checking the idle air control valve which is what regulates intake air as it is mixed with fuel at idle and upon slowing down to an idle speed. When this is not functioning properly, it can cause the RPM’s to fluctuate and hesitate when accelerating from a stop. It is a common problem.

If you would like further help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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. The rpm drops when stopped. It feels like it wants to die then catches to normal, it will do this a couple of times.

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 know if you need a whole throttle body compared to just cleaning it or replacing sensors

I would recommend cleaning and replacing the sensors first. Generally, throttle bodies do not need to be replaced completely, but rather just need specific parts related to them replaced. I would also recommend checking the mass air flow sensor to...

Q: Can't start the car

There is a sensor mounted to the brake pedal assembly called a stop lamp switch, or brake lamp switch. It is mounted to the bracket that holds the brake pedal assembly to the firewall. There will be a three wire...

Q: 2006 suzuki reno is stalling while driving or at a stop,had a camshaft sensor fail and was fixed 2 weeks later same sputtering,cut

Hi Maria. Thanks for contacting us today. In most cases when your car will start but then stalls while you're driving, it's due to a fuel restriction or fuel / air mixture problem. This could be due to the mass...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...