There are a variety of problems that can cause a car's idle to be rough. A rough idle is usually defined by the car idling below its normal speed, loping RPMs, a skipping sound or in a way that causes the car to shake. Idle problems can often be a clue to something more serious going on, so it is best for car owners to get them checked out.Know More
The simplest reason for a rough idle is either a vacuum leak or an incorrect idle speed. A vacuum leak causes air to get into the system and disrupt the normal idling speed. Idle speed is a setting on most cars, and some cars require only a simple tool like a butter knife to correct this. However, the idle speed should not change randomly and another problem is likely to be lurking beneath the surface.
Dirty fuel injectors are another possibility for a rough idle. Fuel injectors do need to be periodically cleaned throughout their lifetime as fuel deposits build up and eventually interfere with the car getting proper fuel. Lack of fuel is similar to lack of air and the idle speed is affected. Other possibilities include spark plugs or the distributor cap and wires.Learn more about Car Parts & Maintenance
A car making a clunking noise could have one or more of a number of problems, including problems with the transmission, exhaust system or wheel bearings. The first step to determining what is causing the sound is to isolate where the sound is coming from. It is also helpful to figure out when the sound occurs.Full Answer >
Cars backfire for several reasons, including air and fuel mixing due to leaking hoses or other mechanical problems. Faulty spark plugs or wires can cause a car to backfire. It can also occur when shifting to a lower gear in a car with high horsepower.Full Answer >
Although there can be many problems causing a squeaky vehicle, the most-common cause is a bad fan belt. A replacement belt can be bought for approximately $10, and it can be installed quickly at an auto shop or easily installed at home using a ratchet.Full Answer >
Car batteries run out for several reasons: some die of old age, while others run out of power due to problems in the vehicle electrical system or lose power when drivers leave lights on, doors open, and the radio on when the car is not moving. Some car battery failures result from driver error while others stem from problems with the cars themselves. Climate affects battery longevity and operation too; batteries in cold, snowy climates might last less than 3 years.Full Answer >