AutoLine Pro Ventus
A cordless smoke machine for mobile techs and anyone tired of battery clamps. The flow meter and lifetime warranty help justify the price.
Amazon $229.99$229.99
2.9/5
A gauge-equipped machine for intake, turbo and exhaust leaks. Skip it if EVAP codes are the main job.
- 11.6-17.4 PSIPressure
- NoEVAP mode
- GaugeGauge
- Built-in pumpAir
Check price at Amazon$199.99
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Gauges allow pressure decay tests
- 23 cap plugs and an intake bladder included
- Air mode doubles as a purge after testing
Cons
- Lowest output is 11.6 PSI, too high for EVAP without an extra regulator
- Warranty published: 1 year
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | ST203 |
|---|---|
| Pressure and smoke | |
| EVAP mode | No |
| Output pressure | 11.6-17.4 PSI |
| Pressure display | Gauge |
| Air-only mode | Yes |
| Power and fluid | |
| Air source | Built-in pump |
| Power | 12V battery |
| Smoke fluid | mineral oil |
| In the box | |
| Cap plugs | 23 pieces |
| Warranty | 1 year |
Alternatives in this type
Solary SD301E
A cheap higher-pressure machine for intake and vacuum leaks. Its output is too high for EVAP testing without a regulator.
Amazon $59.99$59.99
19-23 PSINo
Ancel L3000
A digital-gauge machine for shops that want to show customers a pressure reading. No pressure range or warranty is published.
Amazon $269.99$269.99
Digital
Compare
Compare the Foxwell ST203 with any other automotive smoke machine →
More from Foxwell: every Foxwell product ranked.