For the do-it-yourself mechanic, Many high-idle problems can be identified and remedied with some patient troubleshooting. Other solutions, though, are best performed by a service shop.
One tip is to make sure you are checking the engine idle with the air conditioning and defroster in the OFF setting. With some cars, the onboard computer automatically revs the idle speed slightly when accessories are running, and you won't get a true idle speed if they are at work. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance.
Select basic ads. What to Look For: A bad fuel pump can cause difficulty when starting the vehicle, a rough idle, and stalling. What to Look For: A lousy temperature sensor results in rough idle during cold starts. Once warm, the problem may be less noticeable.
What to Look For: Rough idle is one of the first symptoms to appear, followed by sputtering on acceleration or even stalling, as the problem worsens. What to Look For: Rough idle, slow acceleration, sputtering or a lack of power on acceleration are all symptoms of a leak in the vacuum system. What to Look For: In addition to rough idle, reduced fuel economy, knocking noises, and slow acceleration may also be present. What to Look For: Your car may struggle to turn over and will idle rough once it does.
This is often one of the first symptoms of a deeper problem. So when should you take it in for diagnostics? Some related symptoms to watch for include:. Bottom line, a rough idle is often a sign of something wrong going on with your car.
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Contact Us. License Agreement. Privacy Policy. Prevent unauthorized vehicle use, risky driving, and driver inefficiencies. Fleet related industry news, tips, and insights to help manage your fleet. Login Pricing Does higher rpm mean faster? What happens when the RPM is high? What RPM should my car be at 70mph? Why is my car rpm jumping? When I start my car the rpm goes up? Is rpm idle bad? What should my rpm be at 0 mph?
What are signs of a vacuum leak? How do I know if my engine has a vacuum leak? Can a vacuum leak damage engine? Why is my engine running Rich? How do I stop my car from running rich? How do I know if my fuel mixture is too rich? Previous Article What is low speed engine?
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