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Diagrams show vacuum routing for 1978 Ford 400 V8 pickup and Bronco exhaust emission systems.

AI caption June 2008 · Photo 66 of 131

l978gExhaust "Emission System 392 FORDMOTOR CO. VACUUM DIAGRAMS (Cont) GRV Slaark Delay Valve \ E ac. V r a 0 ve Cant. Valve . 3' 3 7' Spa k Del y V ' Distributor PVS Bypass Valve Air Pump Vacuum Reservoir Spark Delay Valve EGR Vac. . Control i Valve Air Cleaner Fig. 39 400" V8 Pickup, Calif. with Auto. Trans. EGR Valve wilh B.P. Air Cleaner TVS Fuel Separator PCV Valve Delay Valve Air Cleaner Tvs' Delay valve Fuel . Separator " 75% AIR Pump la l Delay Valve Fig. 40 " 40'0"V8 Pickup 8- BroncOpCafsWilh Auto. Trans.

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