The symptoms of a dirty throttle body include rough idle, poor gas mileage, faulty CEL codes, stalling and poor acceleration. Poor gas mileage is the result of the vehicle's ECU, or computer, attempting to adjust the fuel mixture to compensate for throttle plates that are incapable of closing properly. Faulty CEL codes cause various sensor-related issues, such as an illuminated check engine light.Continue Reading
A vehicle with a dirty throttle body experiences difficulty accelerating smoothly. Slowed and uneven acceleration is an indicator of a dirty throttle body. This automotive issue results in a hard gas pedal that requires more pressure to push down.
If the engine idles erratically or sputters when speeding up and slowing down, then the throttle body may require cleaning. Checking gas mileage is a way to diagnose a dirty throttle body. If a vehicle starts getting fewer miles to the gallon, then the throttle body requires cleaning.
The throttle body is a component of the air intake system, and a dirty throttle body can lead to air pollution. This issue leaves excess combustion products within the exhaust, which coats the inside of the throttle body. As a result, a dirty throttle body leads to poor performance and engine stalling.Learn more about Engine
A car jerking when pressing the gas may be the result of an distributor cap problem, vacuum leak or faulty sensor. A car that is jerking mainly in the morning after being parked outside overnight most likely has moisture forming on the inside of the distributor cap.Full Answer >
Cars that have a faulty oxygen sensor will commonly have a poor idle, jerk erratically at a steady throttle or emit a rotten egg odor from the exhaust pipe. If a car has a bad or broken oxygen sensor, this will cause the car to operate less efficiently, causing other problems like the car being difficult to start, its "check engine" warning light coming on or an abnormally high rate of fuel consumption.Full Answer >
One of the most common symptoms of a bad throttle body, or throttle position sensor, according to Reference, is when the car either hesitates to accelerate or stumbles during acceleration. If there seems to be just a bit of a delay between the time you push on the gas pedal and the time it takes for the car to go, a bad throttle body could be the cause.Full Answer >
Problems with acceleration, engine misfires, reduced fuel mileage, stalling and difficulties starting the vehicle are all possible symptoms of a bad crankshaft sensor, according to 1A Auto. A bad crankshaft sensor may also cause the vehicle to idle roughly or make the check engine light come on.Full Answer >