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Home >> Chevrolet >> 1991 >> Caprice Base, 4D Sedan, 4L60/MD8 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Fuel Evaporation Control (C-3) >> Notes
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Fuel Evaporation Control (C-3): Notes

NOTE: On 2.0L, 2.2L & 2.5L engines, no canister purge solenoid is used. Canister is purged by ported vacuum when engine is running above idle. On all other models, one of 2 types of solenoid is used: normally open or normally closed. See CANISTER PURGE SOLENOID IDENTIFICATION table.
CANISTER PURGE SOLENOID IDENTIFICATION

Application Solenoid Type
2.0L, 2.2L & 2.5L TBI N/A
2.3L Normally Closed
3.1 & 3.4L Normally Open
3.3L Normally Closed
3.8L Normally Closed
4.9L Normally Closed
5.0 & 5.7L TBI Normally Closed
5.0L & 5.7L PFI "F" Body Normally Open
5.7L "Y" Body Normally Closed