Customer raised a question：
Hello, we received a sample of this product from your company last December. The customer tested it and provided the following feedback:
1. Compared to the original throttle body, this product exhibits more noticeable motor vibration or speed fluctuations (hunting) at idle – although end users may not perceive it, we can. For manual transmission vehicles, this isn't a major issue; however, for vehicles equipped with automatic transmissions and with the air conditioning on, especially when the transmission/torque converter and pressure relief valve are no longer in good condition, the vibration of the throttle flap or motor at idle can sometimes become more pronounced. I understand this is an aftermarket replacement part; I'm simply reporting this situation.
2. The high-frequency noise generated by the PWM (Pulse Width Modulation) controlled motor is greater than the original part, which is related to the vibration of the throttle flap.
3. I speculate that the internal components of the circuit board are less effective at filtering EMI (electromagnetic interference) than the original throttle body? In fact, capacitors or filter circuits are very inexpensive, typically less than $1. Based on my understanding of BOMs (Bill of Materials), the cost of such circuits for most OEMs is approximately $0.30. Therefore, using inferior components or designs will not result in significant cost savings but will lead to substantial performance differences, especially in older or high-mileage automatic transmission vehicles.
Please verify with your technical department whether the customer's feedback matches their assumption about the components used.
Our company replied：
1. Idle vibration: Under conditions of automatic transmission, air conditioning, and high mileage, the ECU's precision requirement for throttle position feedback is amplified, which may result in slight vibration.
2. PWM noise: We compared it with OE (Original Equipment Manufacturer) products, and the noise levels were basically the same. We tested at 2000Hz, 10000Hz, and 15000Hz, and there was no noise above 15000Hz.
3. EMI (electromagnetic interference) protection of internal circuit board components: We have anti-interference designs and use only automotive-grade electronic components. There is no use of inferior components.
Test video：