2026 FOXWELL ST203 Automotive Smoke Machine Leak Detector, Adjustable Pressure 11.6-17.4 PSI, Dual Mode (Air & Smoke), Pressure Gauge & Flow Meter Show Leak Size, Built-in Air Pump

Price: $266.99 - $214.90
(as of Oct 14, 2026 04:23:20 UTC – Details)

From the brand

Find the Leak, Fix it Fast.

17 years of smoke tech evolution. Every year, we make it better. FOXWELL – built to last, updated to lead.

New Arrivals | Hot Sellers

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【🎈𝗣𝗶𝗻𝗽𝗼𝗶𝗻𝘁 𝗟𝗲𝗮𝗸𝘀 𝘄𝗶𝘁𝗵 𝗗𝗲𝗻𝘀𝗲 𝗦𝗺𝗼𝗸𝗲 — 𝗦𝘁𝗼𝗽 𝗕𝗹𝗶𝗻𝗱𝗹𝘆 𝗥𝗲𝗽𝗹𝗮𝗰𝗶𝗻𝗴 𝗣𝗮𝗿𝘁𝘀】The FOXWELL ST203 automotive smoke leak detector injects visible smoke into the sealed system under test, helping reveal vacuum hose cracks, fitting leaks, and intake gasket leaks that are easily missed during visual inspection. It provides a clearer basis for the next repair step and reduces the need to repeatedly replace suspected faulty parts.
【✨𝗕𝘂𝗶𝗹𝘁-𝗶𝗻 𝗔𝗶𝗿 𝗣𝘂𝗺𝗽 — 𝗡𝗼 𝗕𝘂𝗹𝗸𝘆 𝗘𝘅𝘁𝗲𝗿𝗻𝗮𝗹 𝗖𝗼𝗺𝗽𝗿𝗲𝘀𝘀𝗼𝗿 𝗼𝗿 𝗦𝗵𝗼𝗽 𝗔𝗶𝗿 𝗟𝗶𝗻𝗲𝘀】Connect the ST203 to a compatible 12V vehicle battery, then set up the connections and plug the system under test to begin testing. Fewer equipment connections make setup easier in the driveway or garage, and the unit is easy to move between vehicles—ideal for users looking to upgrade from an external-air smoke machine.
【🎁𝗣𝗿𝗲𝘀𝘀𝘂𝗿𝗲 𝗚𝗮𝘂𝗴𝗲 + 𝗙𝗹𝗼𝘄 𝗠𝗲𝘁𝗲𝗿 — 𝗧𝗿𝘂𝘀𝘁𝘄𝗼𝗿𝘁𝗵𝘆, 𝗗𝗮𝘁𝗮-𝗗𝗿𝗶𝘃𝗲𝗻 𝗗𝗶𝗮𝗴𝗻𝗼𝘀𝘁𝗶𝗰𝘀】The front-mounted pressure gauge displays system pressure, while the flow meter provides airflow feedback during testing. Combine gauge readings with visible smoke to help assess sealing and check suspected leaks. After repairing hoses, fittings, or gaskets, retest to help verify the repair before reassembly.
【🥇𝗗𝘂𝗮𝗹 𝗠𝗼𝗱𝗲 (𝗔𝗶𝗿 + 𝗦𝗺𝗼𝗸𝗲) — 𝗦𝗺𝗮𝗿𝘁𝗲𝗿, 𝗖𝗹𝗲𝗮𝗻𝗲𝗿, 𝗠𝗼𝗿𝗲 𝗘𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁 𝗪𝗼𝗿𝗸𝗳𝗹𝗼𝘄】Start with Air Mode to observe the sealed circuit under test via the pressure gauge and flow meter. If readings suggest a possible leak, switch to Smoke Mode to trace where it escapes. This two-step approach helps reduce unnecessary smoke output and oil consumption, allowing DIYers and technicians to troubleshoot leaks in a more organized way.
【🛒𝗙𝗮𝘀𝘁, 𝗗𝗲𝗻𝘀𝗲 𝗦𝗺𝗼𝗸𝗲 𝗢𝘂𝘁𝗽𝘂𝘁 — 𝗙𝗶𝗻𝗱 𝗟𝗲𝗮𝗸𝘀 𝗶𝗻 𝗠𝗶𝗻𝘂𝘁𝗲𝘀】Once smoke starts, the thick, visible smoke helps you trace leaks in hoses, fittings, gaskets, and other hard-to-inspect areas. Beyond checking fault codes and visually inspecting parts, you can follow the smoke to narrow down the problem. When troubleshooting intake and vacuum leaks, the ST203 provides visual evidence that complements OBD diagnostic tools.
【🎉𝗨𝘀𝗲𝗿-𝗙𝗿𝗶𝗲𝗻𝗱𝗹𝘆 & 𝗖𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗞𝗶𝘁 — 𝗥𝗲𝗮𝗱𝘆 𝘁𝗼 𝗨𝘀𝗲 𝗢𝘂𝘁 𝗼𝗳 𝘁𝗵𝗲 𝗕𝗼𝘅】With the appropriate adapters and test methods, it can check turbo, intake, exhaust, vacuum, and fuel system circuits on compatible vehicles. The included 23-piece plug set, smoke hose, power cord, adapters, and intake bladder help connect and seal various openings. Testing through the EVAP service port requires an additional EVAP Service Port Adaptor, sold separately.
【👍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.