A fault code like P0442 or P0455 only tells you: there's a leak somewhere in the EVAP system. It doesn't tell you exactly WHERE – and without a smoke test, the search for porous hoses, leaking connectors or hairline cracks in the intake tract often turns into pure guesswork with hours of removing and disconnecting parts. A smoke leak detector makes such leaks visible instead of guessing at them: test smoke is introduced into the system under slight pressure, and it immediately becomes visible at the leaking point. Anyone who regularly diagnoses EVAP, intake or vacuum systems can hardly do without this tool – the only question is which device suits your own workshop.
How important are smoke density and pressure control for reliable leak detection?
Smoke density directly determines whether even small leaks become visible – all three devices compared here generate dense test smoke via an integrated air pump and therefore don't need an external compressed air source. The AUTOOL SDT205 provides even smoke distribution in the closed system via a stable pressure supply. The AUTOOL SDT206 goes a step further: a separate air and smoke mode first allows a pure pressure pre-check, and the integrated pressure gauge makes the test pressure visible and controllable – an automatic safety shutoff also protects the device from overheating during continuous use. The MR CARTOOL T130 works with a defined output pressure of 15–17 PSI and a flow rate of 6 l/min, enabling even smoke distribution without stressing sensitive vehicle components.
Which connection adapter set is needed for EVAP and intake diagnostics?
An EVAP connection adapter is included with all three devices, but they differ in the overall scope of the included adapter set. The AUTOOL SDT205 comes with the most extensive set: standard cone adapter, EVAP connection adapter, universal adapter set, valve core tool and hard rubber hose adapter cover most common connections on intake, vacuum and EVAP systems. The MR CARTOOL T130 comes with an EVAP connection adapter, universal cone adapter and a rubber adapter, plus a valve wrench. For all devices the same applies: only use suitable test oil such as baby oil or liquid paraffin, since compatibility ultimately always depends on the respective vehicle system and the connections available.
Which systems can the devices be used on – EVAP, intake or also exhaust?
All three smoke leak detectors cover intake, vacuum and EVAP systems; only the MR CARTOOL T130 additionally tests exhaust systems. The AUTOOL SDT205 also covers charge air, EGR and turbocharger connections as well as fuel vapor lines in addition to intake, vacuum and EVAP systems, and can be used on cars, motorcycles, vans and ATVs. The AUTOOL SDT206 is specifically designed for intake, vacuum, EVAP as well as turbo and charge air systems of modern vehicles. The MR CARTOOL T130 extends the areas of use to include exhaust diagnostics and is approved for cars, motorcycles, off-road vehicles, light commercial vehicles and ATVs – anyone who wants to visually inspect the exhaust system in addition to EVAP and intake will find the only solution of the three with this extra coverage here.
Which smoke leak detector is best?
For most workshops focused on EVAP and intake diagnostics, the AUTOOL SDT206 is the best choice, as its separate air/smoke mode, pressure gauge and overheating protection enable controlled, repeatable diagnostics. Anyone wanting to get started with a first smoke diagnostic solution with the most extensive adapter set possible while saving on budget is well served by the AUTOOL SDT205 – it covers the same core systems and comes with the largest included adapter set of the three devices. Anyone who regularly also needs to check exhaust systems, for example on turbo and direct injection engines, should reach for the MR CARTOOL T130 with its extended EVAP, intake and exhaust coverage. All three are pure diagnostic aid devices for visual leak inspection and do not replace an OBD2 diagnostic tool – but as a complement to existing fault code diagnosis, they are an enormous time-saver.
Comparison table: smoke leak detectors at a glance
| Area of use | Recommendation | Price |
|---|---|---|
| Entry level / small budget, large adapter set | AUTOOL SDT205 | €349.00 |
| EVAP and intake diagnostics with pressure control & safety shutoff | AUTOOL SDT206 | €499.00 |
| Also checks exhaust systems (EVAP + intake + exhaust) | MR CARTOOL T130 | €499.00 |
The 3 smoke leak detectors in detail
AUTOOL SDT205 Smoke Leak Detector for Vehicle Diagnostics & EVAP Leak Detection
The AUTOOL SDT205 is the entry-level solution for workshops that want to cover leak detection in intake, EVAP and vacuum systems without a large investment. The integrated air pump makes the device independent of external compressed air, and the included adapter set (standard cone adapter, EVAP connection adapter, universal adapter set, hard rubber hose adapter) covers the most common connections. Price: €349.00. 
AUTOOL SDT206 Smoke Leak Detector for EVAP Diagnostics and Leak Detection in Workshops
The AUTOOL SDT206 is the consistent further development of the SDT205: a separate air and smoke mode with an integrated pressure gauge allows a controlled pre-check for pressure loss before the actual smoke test starts. An automatic safety shutoff on overheating protects the device during continuous use. Price: €499.00. 
MR CARTOOL T130 Smoke Leak Detector for EVAP, Intake & Exhaust Diagnostics
The MR CARTOOL T130 additionally covers exhaust diagnostics on top of EVAP and intake systems. With an output pressure of 15–17 PSI, a flow rate of 6 l/min and the included adapter set (EVAP connection adapter, universal cone adapter, rubber adapter), it can be used on cars, motorcycles, off-road vehicles, light commercial vehicles and ATVs. Price: €499.00. 
Whether an entry-level device, a mid-range model with pressure control, or extended exhaust diagnostics – with the AUTOOL SDT205, AUTOOL SDT206 and MR CARTOOL T130 you can make leaks in EVAP, intake and vacuum systems visible instead of guessing at them. If you have questions about the right choice for your workshop, our team will be happy to advise you personally at 0711-3654 4645. Buy now, pay later is available via Klarna or PayPal.