2026 ST203 Smoke Machine Leak Detector - 12 Volts

Fuel Leak Detector

Quick Overview: Covers EVAP, Intake, Exhaust, Vacuum & Fuel Systems. Dual Mode (Air + Smoke) – Air pre-checks without oil waste, Smoke pinpoints the spot. Pressure Gauge + Flow Meter – See real-time system pressure and leak rate. Know pinhole vs major crack instantly. Built-in Air Pump – No external compressor, plug into 12V battery and start. 10-Min Test – No Cooldown – Runs longer than basic testers. Press restart and keep going. Complete Kit – Ready to use out of the box.

Why ST203 Stands Out – Smarter Than Basic Testers: Unlike single‑mode smoke machines that only inject smoke and leave you guessing, ST203 gives you Air Mode to check for leaks first, then Smoke Mode to pinpoint exactly where. The built‑in pressure gauge and flow meter tell you how big the leak is – not just that there is one. No external compressor needed. Runs longer without cooldown. Covers EVAP, intake, exhaust, vacuum, and fuel systems on most 12V gas and diesel vehicles.

Pinpoint Leaks Fast – Solve Real Problems: Check Engine light on? Rough idle? Failed emissions test? Poor gas mileage? Hesitation on acceleration? These are often caused by hidden leaks in EVAP, vacuum, or intake systems. ST203 injects visible smoke into sealed systems – you'll see exactly where air is escaping in minutes. No more guessing or throwing parts at the problem. Fix it right the first time.

Air + Smoke Dual Mode – Know Before You Waste Oil: Start with Air Mode to pressurize the system and check for leaks – watch the flow meter; if it drops, you have a leak. Then switch to Smoke Mode to visually pinpoint the exact spot. 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 smoke oil.

10-Minute Test Cycle + No Cooldown – Keep Working: ST203 runs a full 10‑minute test cycle – longer than basic 5‑minute testers. Press restart to start another cycle immediately. No waiting for cooldown. Inverter technology prevents overheating and keeps you diagnosing without interruption. Ideal for shops handling multiple vehicles or deep system checks.

Low Oil Consumption, Cooler Operation – Save Over Time: Advanced smoke generation technology uses only ~3ml of smoke oil per 10-minute test – up to 50% less than ordinary machines. Runs cooler and draws less power. More tests per bottle, less strain on your car battery, and a longer‑lasting machine.

Ready to Use Out of the Box – Simple Setup: Complete kit includes smoke tube, power cords, adapters, funnel, hook, and user manual – just add smoke oil. Step 1: Pour in baby oil. Step 2: Connect the machine. Step 3: Connect power cord to a 12V battery. Step 4: Connect the hose, press start, and watch for smoke. Compatible with most 12V gasoline and diesel cars, SUVs, and light trucks. No hidden extras to buy.

Why Choose This Fuel Leak Detector?

The ST203 features a dual-mode system that allows you to perform air pre-checks to detect leaks before using smoke to pinpoint their exact location, saving you time and oil. With its built-in air pump and 12V compatibility, you can diagnose EVAP, intake, exhaust, vacuum, and fuel systems on most vehicles without needing an external compressor.

Designed for efficiency, this machine offers a 10-minute test cycle with no cooldown required, allowing for continuous operation during deep system checks. Its advanced technology ensures low oil consumption and cooler operation, making it a reliable tool for professional shops and home mechanics alike. Order yours today and see the difference.

• Free & Fast Shipping - We offer free shipping to most of the USA with a normal delivery time of 3-7 days. However, due to the current situation, additional delivery time (up to 3 weeks) may be required for some items.
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• Handling Time - Orders are processed and shipped within 1-2 business days of receiving cleared payment.
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• 30-Day Hassle-Free Returns - We want you to be completely satisfied with your purchase. If you are not, you can return the item within 30 days of receiving it for a full refund or exchange.
• Easy Return Process - To start a return, simply contact us and we will provide you with a prepaid return shipping label and detailed instructions.
• Restocking Fee - There are no restocking fees for returns. However, the buyer is responsible for return shipping costs if the return is not due to a seller's error.
• Refund Processing Time - Refunds will be processed within 5 business days of receiving the returned item in its condition.

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