Skip the auto shop - Our mechanics make house calls

Q: car surges when idle or in park. rpm bounce. car has cut off, but cuts back on.

asked by on

When I am parked or idle (stop light etc) I can feel my car shaking and surging. The RPM bounce. My car also cut out the other day, but cut back on after restarting it. I have had the water pump replaced, a new battery, a new thermostat, and some kind of pulley that was replaced when my car overheated. sorry don't know the exact name as I'm at work. what is wrong with my car? Need help!!!!!!!!!!

My car has 128000 miles.
My car has an automatic transmission.

It sounds like your idle air control valve could be failing. The idle air control valve is responsible for maintaining the proper amount of air into the intake while the vehicle is slowing down to a stop and resuming idle speed. When this valve fails, it can cause the exact symptoms that you described. I would recommend having the idle air control valve inspected by a qualified professional to determine if it is performing properly. If the IAC valve has failed, I would recommend having it replaced at your earliest opportunity.

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
  • Home
  • Questions
  • car surges when idle or in park. rpm bounce. car has cut off, but cuts back on.

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: I have codes P0151, P0171, and P0174. I have changed out my O2 sensor, but now I have all these codes

Hey there. The codes you have downloaded simply relate to malfunctions in the "engine management system." It appears codes were set for oxygen sensor voltage out-of-range, possible EGR (exhaust gas recirculation) problems such as a blockage, and a generic code...

Q: timing chain/belt

Hello, thank you for writing in. The timing belt can simply be replaced. With that being said, there needs to be some thought into why it broke. Depending on the age, it may have just been worn out. If there...

Q: matchingi have a 2006 Suzuki Forenza 4dr and i had a starter replaced but i believe the didnt attach th battery on right because i

Hi there. It is quite possible that either battery cables were not attached properly after this service was completed or the cables are damaged and not relaying electricity as they should. The best way to determine this issue is to...

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...
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...
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...