MelloYello
Posts: 955
Joined: 12/6/2003
Status: offline
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The center of the upper intake on the SEFI engine will have one large fitting with two smaller connections that face the firewall and a single large fitting that faces the front of the engine. The large fitting that faces the firewall normally connects to the vacuum tree and supplies the power brake booster. The MAP sensor is usually connected to the vacuum tree also. The two smaller fittings are connected to the fuel pressure regulator and to the line that supplies the EVP, TAD, and TAB solenoids. The single large fitting facing forward connects to the charcoal canister purge valve. If you vehicle is not equipped with a charcoal canister, then this line needs to have a small breather filter attached beyond the canister purge solenoid. The injectors and Idle Air Bypass Valve are calibrated for the additional air coming in from the canister purge. An orifice may be required in the canister purge line to control air flow if the canister is not used.
BLU / HEAT/DEFROST / YLW
BLU / HEAT/DEFROST / GRN
RED / UPPER MODE / RED
BRN / LOWER MODE / PRP
ORG / RECIRCULATING/OUTSIDE AIR / ORG
GRY / CONNECT TO A ON/OFF SWITCH IN LINE W/ VLT. SUPPLY
VLT (LOOKS PINK) / VACUUM SOURCE / BLK
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vacum lines - 
