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HOW TO DIAGNOSE INTAKE SYSTEM & VACUUM LEAKS
This procedure will locate leaks in vacuum lines as well as manifolds, EGR valves,
oil seals, gaskets, solenoids, o-rings, ducting, throttle shafts, diaphragms,
canisters, and more.
For best results, test in a draft-free area
1. Remove the air filter housing from ducting
2. If the vehicle has a round inlet tube from the air filter, place the EZINT95
Adaptor
into the duct toward the engine
3. Put Vapor Supply Hose into Adaptor to introduce vapor into the
system
4. Use provided Inspection Light to locate leaks
ALTERNATIVE METHOD
1. Select an appropriate vacuum line to access the vacuum system
(i.e. a brake booster supply line before the check valve)
2. Seal all system openings
a. Air Intake must be sealed to prevent vapor from leaking back through
the intake
b. To seal the intake, use Cap Plugs, a latex glove, or plastic wrap around the
filter
3. Put Vapor Output Hose into Adaptor to introduce vapor into the system
4. Use provided Inspection Light to locate leaks
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