What Causes Increased Noise After Cleaning the Throttle Body?
4 Answers
Increased noise after cleaning the throttle body is caused by excessive engine oil. Excessive Engine Oil: When there is too much oil in the engine cylinder, it creates unnecessary resistance to the crankshaft's rotation, affecting heat dissipation and power output, which in turn increases fuel consumption. The amount of oil entering the combustion chamber significantly increases, leading to more carbon deposits in the combustion chamber. This increases piston movement resistance and reduces engine power. Carbon deposits in the cylinder can become red-hot, potentially causing pre-ignition. If they enter the cylinder, they can accelerate wear on the cylinder and piston and further contaminate the engine oil. Additionally, excessive oil increases the stirring resistance of the crankshaft and connecting rod, resulting in increased noise. How to Handle Excessive Engine Oil: You can use a detergent tube to extract the excess oil. Remove the detergent tube (a shampoo or body wash tube will also work), clean the tube thoroughly, and let it dry to avoid contaminating the oil. Open the car hood and the oil cap, then use the detergent tube to pump out the excess oil into another container, such as a plastic bottle.
Increased noise after cleaning the throttle body is quite common. I think the main reason is that if residues aren't completely removed during cleaning, such as cleaning agent accumulating in corners, it can affect the throttle's opening and closing, causing unstable air flow and making the engine produce strange noises. I've experienced this before too - after cleaning it myself, the car started humming loudly. Later I found out the idle control valve was clogged. After disassembling and cleaning it again, the problem was solved. For routine throttle body cleaning, it's best to use specialized spray cleaners - don't try to save money by using random products. After cleaning, remember to press the accelerator pedal a few times to expel any residues. This prevents the noise from recurring and saves you the trouble of having to redo the repair.
After cleaning the throttle body, the noise increased. I suspect that during the cleaning process, dust or dirt entered the intake pipe, causing poor airflow and putting extra strain on the engine, which resulted in louder noise. As someone with some automotive knowledge, I recommend checking if the idle is stable after cleaning. If it's unstable, it might be due to a drifting throttle position sensor reading or a leaking seal. I once did it myself, and the noise was terrifyingly loud. Later, I used an OBD scanner to read the fault codes, which helped pinpoint the issue. Timely inspection can prevent more serious problems, such as increased fuel consumption and degraded driving experience.
Increased noise after throttle body cleaning is an issue I've encountered several times, usually caused by incomplete cleaning leading to idle valve or EGR system problems. Engine imbalance will result in louder noise. Choosing genuine cleaning products is crucial - never opt for cheap alternatives. My routine is to manually check airflow consistency after cleaning and ensure all components are properly secured. Early detection can save significant repair costs.
