Q: Car idles, surges, then lowers, and then dies

asked by on

My car is idling and surges high, then it goes lower than normal, then completely dies. What is causing such as this?

Hello. It sounds like there may be a loose or disconnected vacuum hose. The upper or lower intake gasket could be leaking as well. There is also a possibility that the mass airflow (MAF) sensor, idle air control valve, or throttle position sensor is faulty. My suggestion is to have a certified technician, like one from YourMechanic, come and complete an inspection to inspect why your car is stalling.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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. Car idles, surges, then lowers, and then dies

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: the car has suffocation feeling when accelerator is pressed and does not speed constantly

This sounds like a low fuel pressure problem, or an air filter and mass airflow (MAF) sensor problem. Check the fuel pressure and replace the fuel filter first to see if it helps. Next, have the system computer scanned...

Q: My car starts but immediately kills

Hello. Thank you for writing in. You have done well to replace the main fuel delivery system in order to correct this. It does seem to be a fuel delivery issue. There are to major components you have not looked...

Q: My car runs poorly when the idle sensor is connected, without it the car runs fine

The throttle position sensor is designed to monitor the position of the throttle butterfly valve in relation to the throttle pedal position. If the engine runs rough when it is plugged in and runs fine when it is unplugged, then...

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...
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...
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...