What are the symptoms of a faulty exhaust brake solenoid valve?
2 Answers
Introduction to the symptoms of a faulty exhaust brake solenoid valve: The push rod cap of the exhaust brake control valve fails to return to its position. Due to the unreturned push rod cap, the exhaust brake control valve cannot be depressed, and the exhaust brake working cylinder takes in air, causing the exhaust brake to remain in the working state continuously, resulting in poor engine performance. Common vehicle faults include the following aspects: 1. Common vehicle faults manifest as: sudden changes in working conditions, abnormal sounds, abnormal odors, abnormal exhaust smoke, abnormal temperatures, abnormal appearance, abnormal fuel and lubricant consumption, and leakage. Common faults are those with high frequency of occurrence and are often encountered during use. 2. Abnormal vehicle performance: Abnormal vehicle performance refers to poor power and fuel economy, mainly manifested as significantly lower maximum driving speed, poor acceleration performance, high fuel consumption, and high oil consumption. The ride comfort is poor, with noticeably increased vibration and noise. The vehicle's handling stability is poor, prone to deviation and front-end oscillation; braking deviation, long braking distance, or no braking, etc.
As someone who has driven many heavy trucks, I personally experienced an exhaust brake solenoid valve failure. Back then, when descending a steep slope, the brakes suddenly failed, and the truck slid uncontrollably like a runaway horse. I had to stomp on the foot brake to save myself. Daily symptoms include the exhaust brake not working at all or intermittently, abnormally high engine temperatures, the overheating warning light coming on, and a sharp increase in fuel consumption. Sometimes, there's also a hissing sound of air leakage, and after parking, the exhaust pipe becomes hot with a strange odor. This fault poses significant risks, especially during long-distance hauling, as it can lead to loss of control and accelerated wear of brake pads. It's advisable to regularly check the wiring and connectors for moisture and replace the valve early. Delaying repairs can result in high repair costs and danger. Proper maintenance can save fuel and improve driving safety.
