Workshop Test: Find an Intake Leak With Controlled Smoke

Repeatable testControlled smoke can reveal unmetered-air leaks when the intake is sealed at the correct points and pressure is kept below the system limit.Evidence-led

System diagram and pressure limit;Throttle, PCV, purge, brake-booster, and crankcase paths;Smoke flow and exact exit point

Why this matters

Tool value depends on the question it can answer safely, the vehicles and systems it truly supports, and the repeatability of the result.

Evidence to capture first

Test with the engine off
Connect through an approved adapter
Control expected openings
Confirm any smoke location visually and repair without introducing debris

A disciplined path

Use approved smoke fluid and equipment
never use flammable vapor or excessive pressure.

Decision point

workshop

Source desk

Use current model-specific service information for specifications, connector locations, disabling procedures, and tightening values. The following public resources support the broader safety or system context used in this guide.