2026 FOXWELL ST203 Automotive Smoke Machine Leak Detector

• Brand : FOXWELL
• Color : Orange
• Number of Items : 1
• Item Highlight : 11.6-17.4 PSI, Dual Mode (Air & Smoke), Pressure Gauge & Flow Meter Show Leak Size, Built-In Air Pump, For Most 12V Vehicles 11.6-17.4 PSI, Dual Mode (Air & Smoke), Pressure Gauge & Flow Meter Show Leak Size, Built-In Air Pump, For Most 12V Vehicles
• Manufacturer : FOXWELL

About this item

• 【ST203 | Quick Overview】Dual Mode (Air + Smoke) – Air mode pre-checks for leaks without wasting oil. Smoke mode pinpoints the exact location. Pressure Gauge + Flow Meter – See real-time system pressure and leak size. Know if it's a pinhole or a major crack instantly. Built-in Air Pump – No external compressor needed. Works with any 12V system. 10-Min Test Cycle + Instant Restart – Keep testing without waiting for cooldown. Fast, Dense Smoke Output – Produces thick, stable smoke in seconds. Safe for sensors and lines. Complete Kit – Includes 23-piece plug set, pressure gauge, flow meter, and all adapters. Ready to use out of the box.
• 【Why ST203 — Judge, Measure, Locate】Most smoke machines do one thing: blow smoke. ST203 does three — check if there's a leak (Air Mode + flow meter), measure how big it is (flow meter reading), and pinpoint where it is (Smoke Mode). Know before you fix. Verify after you fix. Covers turbo, intake, exhaust, vacuum, and fuel systems on most 12V gas and diesel vehicles. Built-in air pump, no downtime — ideal for busy shops and technicians who test multiple vehicles every day. Also great for advanced DIYers, car enthusiasts, and used-car inspectors who want professional-level diagnostics without paying professional-level prices.
• 【Fix Problems Fast — Reduce Comebacks, Improve Turnaround】Check Engine light, rough idle, failed emissions, loss of power, poor gas mileage — these are often caused by hidden leaks. Traditional diagnosis relies on guesswork and parts swapping, which costs time and money. ST203 injects visible smoke into sealed systems and locks onto the leak location in minutes. Fix it right the first time. Fewer comebacks, faster turnaround.
• 【Air + Smoke Dual Mode — Check First, Then Pinpoint】Start with Air Mode to pressurize the system and watch the flow meter — if the reading drops, you have a leak. Then switch to Smoke Mode — dense white smoke escapes right at the leak point. The pressure gauge shows real-time system pressure, and the flow meter tells you leak size — high flow = big leak, low flow = tiny pinhole. No guesswork, no wasted oil.
• 【Turbo, Intake, Exhaust, Vacuum & Fuel — Full System Coverage】Works on most 12V gas/diesel cars, SUVs, light trucks, motorcycles, ATVs, boats, and snowmobiles. Complete professional kit includes 23-piece plug set, smoke hose, power cords, adapters, intake bladder, and more — ready to go to work right out of the box.
• 【17 Years of R&D — Tested on Real US Vehicles】Backed by FOXWELL's 17 years of R&D experience across multiple automotive fields. The ST203 is regularly tested on real US vehicles across a wide range of makes and conditions — so you get a diagnostic tool that performs in real-world shops, not just on paper. Trusted by professional technicians and advanced DIYers who demand reliability every time they pick it up.