AQYY Automotive Smoke Machine 12V Leak Detector — Red, Adjustable Flow & Pressure Gauge

AQYY Automotive Smoke Machine is a portable 12V smoke and pressure tester that finds leaks in EVAP, intake, cooling, turbo and vacuum systems quickly and accurately.

This compact red smoke tester combines a built-in air pump, adjustable flow and a pressure gauge so you can locate even small leaks without extra equipment. It runs from a vehicle battery, uses a simple oil-based smoke medium, and includes the adapters needed to hook to common automotive lines. Safety features like automatic overheat shutoff and low-temperature protection make it suitable for repeated diagnostic work in a garage or roadside setting.

How does the AQYY smoke machine reveal leaks?

The unit produces visible white smoke that escapes through leaks or the built-in air pump pressurizes a circuit so you can hear or feel failing seals. Switch between air-testing to detect larger breaches and smoke-testing for precise visual confirmation. A clear pressure gauge and adjustable flow let you tailor output to sensitive components.

• Dual modes: air mode (19 PSI pump) and smoke mode for visual detection
• Adjustable flow knob to increase or reduce smoke density
• Onboard pressure gauge shows real-time circuit pressure
• Includes adapters for EVAP, intake, turbo and cooling system access

What are the steps to use this smoke leak detector?

Using the AQYY tester is a three-step process designed for speed and consistency. After adding the recommended oil medium (baby or mineral oil), connect the unit to a 12V source, attach the appropriate adapter, and select air or smoke mode to begin diagnosis. Monitor the gauge and watch for escaping smoke to pinpoint the problem area.

• Fill the fluid reservoir with baby or mineral oil (not included)
• Attach connectors and clamp to the 12V battery for power
• Select air or smoke mode depending on the test objective
• Inspect hoses, seals or components where smoke or pressure drops occur

Is it safe to run this machine for extended checks?

AQYY built in protective systems to reduce risk during prolonged diagnostics. The unit automatically shuts off if internal temperature goes above a safe threshold, then resumes once cooled, and it includes safeguards for very cold conditions. These features help protect both the device and the vehicle while you work.

• Automatic overheat cutoff above 75°C (167°F)
• Anti-freeze protection down to -20°C for cold environments
• Durable housing to withstand typical workshop use
• 12V operation avoids need for external compressors or heaters

Which vehicle systems can this smoke tester assess?

Designed for broad compatibility, the AQYY smoke machine handles evaporative emissions, intake and vacuum lines, turbocharger housings, and cooling circuit checks. The included adapter kit simplifies connections to many common ports so you can test multiple areas without buying extra fittings. It’s well-suited for passenger cars, light trucks and small fleet maintenance.

• EVAP system leak detection for fuel vapor containment
• Intake and vacuum line checks to diagnose hard starts or rough idle
• Cooling system and heater-hose inspections for hidden leaks
• Turbo and intercooler seals testing to reveal boost leaks

Who is this for: The AQYY Automotive Smoke Machine is aimed at home mechanics, independent technicians, and small shop owners who need a portable, all-in-one leak diagnosis tool. It’s useful when you want faster troubleshooting without renting specialty equipment—ideal for routine maintenance, pre-purchase inspections, and troubleshooting drivability or fuel-efficiency issues. Professional users will appreciate the adjustable output and safety features; DIYers will value the straightforward setup and included adapters.