Q: My car has a high or surging idle

asked by on

My truck is having idle issues. Sometimes it's normal. Sometimes it idles at 1300-1400. Other times it's right at 1000. Engine temperature makes no difference. Sometimes when i coast down the road in neutral or with the clutch pressed in the engine surges between 1000 and 1500. Truck has a new idle air control valve. Not even a month old. Would changing my TPS solve this problem? If not what could it be? I've put a lot of time and money into this truck to bring it back to life. This issue has me considering selling it. Please help. Thank you in advance.

My car has 166000 miles.
My car has a manual transmission.

Hi there:

The throttle position sensor is the most common component that causes similar idle issues you’re experiencing, so it makes sense that replacing the TPS might be a good start. However, other issues could include dirty throttle body or fuel injectors, or an idle control valve that’s damaged or dirty as well. To determine the exact source, you might want to contact a mobile mechanic to have them complete an engine has a rough idle inspection first.

Was this answer helpful?
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 a high or surging idle

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: Uncontrollable shaking

Hello and thanks for writing in. Shaking at high speeds is often times related to tires that may be out of balance, low on air, potentially a badly aligned front end or failing suspension components or ball joints. When any...

Q: Alarm is not factory and won't shut off lost my fob how do I turn it off

Look under the dashboard for the alarm reset button and try and hold it in when you turn on the ignition switch. If this does not work, then try turning on the ignition the hold button in and turn off...

Q: Q: Battery ?

On some car alarm systems, if battery voltage drops below a threshold, the alarm goes off. In your circumstance, you should have the battery load tested to rule the battery in or out as a possible cause. The security system...

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...
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...
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.