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the causes for the small leak are listed as
hose connections --intake leak--- EVAP canister--- EVAP canister purge valve
check hoses for small cracks ( old hoses) or replace the purge valve
The EVAP service port is located in the EVAP purge pipe between the EVAP
purge solenoid and the EVAP canister. The service port is identified by
a green colored cap.
Fig. Showing location of (1) Evaporative Emissions (EVAP) Canister
Purge Solenoid and (2) Exhaust Gas Recirculation (EGR) Valve
Fig. EVAP Purge valve solenoid (3) mounting bolt (2) and insulator
(1) on 2000-2005 4.8L, 5.3L, 6.0L Engines
Its located in the air filter housing....The volume air flow sensor also incorporates the barometric pressure sensor and the air intake sensor....If you are replacing either of these sensors replace the volume airflow sensor.......
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