Q: My engine idles heavy 1/3 of the time
My car normally idles (when stopped at a light) at about 600 RPM. However, about one third of the time, it will rev up to 900 or 1,000 RPM and try to lurch forward. The check engine light does not come on when this happens. My car has 120,000 miles. What could be the cause?
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
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
What others are asking
Convertible top not working.
The first thing to do is to see if the convertible top fuse is ok. Then you should check that the power to and from the top switch is flowing. If both are ok then the power top motor should...
Bad shaking and grinding
This is a sign of potentially bad or worn wheel bearings (https://www.yourmechanic.com/services/wheel-bearings-replacement). When wheel bearings wear out or become damaged due to dirt or debris or lack of proper lubrication, they will cause this type of vibration which is more...
2005 F250 5.4L Gas Will Not Start-HELP Please!
It sounds like you may be having an issue with the starter solenoid or the starter relay (https://www.yourmechanic.com/services/starter-relay-replacement). The relay is overload protected, so if the system is trying to pull too much amperage, it will shut down. Also, if...
Car temperature gets hot and makes a thumping noise.
Hello. If the engine is using coolant like this then there is a serious issue. I usually do a pressure test of the cooling system first to make sure that there are no leaks. If there are no external leaks...
Sport mode fuse location in 2012 Nissan Rogue?
Hello. My research does not indicate that there is not a fuse for the sport mode feature. It may be possible that the switch itself is bad, or that there is an engine management issue that is preventing the sport...
Why does my tensioner for my serpentine belt only move about 3" on my 2003 Santa Fe
The tensioner on your vehicle should move more than this. You need to start by checking the drive belt routing. If the belt is not routed right then it will appear that the tensioner is not moving enough. If the...
Can I try using blue devil head gasket repair even if I'm not even sure that the head gasket is the problem?
You can try the Blue Devil head gasket repair fluid. The only thing is if the cylinder head has a crack, the gasket repair will not effect aluminum or cast iron. For the conditions that your described, either the Idle...
Radiator not holding water
Replacing the radiator hoses (https://www.yourmechanic.com/services/radiator-hose-replacement) is a fairly minor job if that is in fact all that needs to be done. Many times, when a car is being sold at a very deep discount, there may be a number of...
My headlight bulb on 2008 mini cooper dont turn on even after replacing a new one and the fuse are all ok,what can be the problem?
Using a voltmeter, check for battery voltage at the bulb socket with the headlight switch on (be careful not to short circuit the bulb terminals). If you detect battery voltage at the bulb socket, that means the the bulb holder...
Related articles
How Do Rotor Engines Differ From Regular Engines?
Rotary engines use three-sided rotors inside an oblong housing instead of pistons. Rotary engines create lots of horsepower, but aren't as efficient.
How to Prep an Engine Block for Paint
When When you are rebuilding an engine (https://www.yourmechanic.com/article/how-a-modern-engine-works), you’ll probably want to paint the engine block. It serves a few purposes including being clean and attractive in appearance, protecting from corrosion and rust, and offering a custom look, even matched...
What Does the Automatic Transmission/Automatic Gearbox Warning Light Mean?
The automatic transmission warning light means there's an issue with the transmission, possibly the fluid temperature, fluid level, or pressure.
Browse other content
Services
Estimates
Maintenance