Q: My car has idling problems that come and go

asked by on

Hi, Recently I have been having troubles with my car, I have spoken to the local mechanics about this and they are honestly quite useless and didn't seem to have any idea. Anyway, my car has a 2.4 litre Mitsubishi petrol engine in it. - 90% of the time it will start and run fine however the idle is never consistent. - The other 10% the engine will either start and then die immediately, or will surge anywhere from 250-500 rpm. Pressing down on the accelerator will keep it going however as soon as I take my foot off the engine will stop again.

I would like to know what could cause this. I have replaced spark plugs so I don't think it would be that. I have also cleaned the throttle body out.

It has also been suggested that a vacuum leak Could cause this. There is a high pitched whistling noise coming from the engine but I cannot find it.

A faulty o2 sensor has also been suggested. But really I am at a loss to explain.

Any help would be much appreciated.

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 has idling problems that come and go

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 i remove a stripped bolt from a battery post clamp?

Hello. From what you describe it would appear that your battery terminal will likely need to be replaced. If you do not have the resources to have it professionally replaced then replacing it on your own could be another option....

Q: Stalling accelerating idling rough

It sounds like the float level was set too low and causing the engine to starve of fuel. You also may need to verify the vacuum advance works and the centrifugal advance works in the distributor by using a timing...

Q: Car remote unlocks doors but doesn't disable alarm. 2011 Mitsubishi Endeavor

Hi there. In many cases, when an aftermarket device is added to your security system, it can trigger an error code that is stored in the ECU which can cause the issues you're experiencing. However, even removing the system will...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.