| Repair Guides | Vacuum Diagrams | Vacuum Diagrams

Following are vacuum diagrams for most of the engine and emissions package combinations covered by this guide. Because vacuum circuits will vary based on various engine and vehicle options, always refer first to the vehicle emission control information label, if present. Should the label be missing, or should vehicle be equipped with a different engine from the vehicle's original equipment, refer to the diagrams below for the same or similar configuration.

If you wish to obtain a replacement emissions label, most manufacturers make the labels available for purchase. The labels can usually be ordered from a local dealer.

See Figures 1 through 128

Fig. Fig. 1: Vacuum hose routing-1967 models

Fig. Fig. 2: Vacuum source chart-1967 models

Fig. Fig. 3: Vacuum hose routing-1968 200, automatic transmission

Fig. Fig. 4: Vacuum hose routing-1968 200, manual transmission

Fig. Fig. 5: Vacuum hose routing-1968 289 and 302 2bbl, automatic transmission, with A/C

Fig. Fig. 6: Vacuum hose routing-1968 289 and 302 2bbl, automatic transmission, without A/C

Fig. Fig. 7: Vacuum hose routing-1968 289, 302 2bbl and 302 4bbl manual transmission

Fig. Fig. 8: Vacuum hose routing-1968 302 4bbl, automatic transmission

Fig. Fig. 9: Vacuum hose routing-1968 390 2bbl, automatic transmission, with A/C

Fig. Fig. 10: Vacuum hose routing-1968 390 4bbl, manual transmission

Fig. Fig. 11: Vacuum hose routing-1968 390 4bbl, automatic transmission, without A/C

Fig. Fig. 12: Vacuum hose routing-1968 427 4bbl, automatic transmission

Fig. Fig. 13: Vacuum hose routing-1969 250 with A/C

Fig. Fig. 14: Vacuum hose routing-1969 250 1bbl and 302 2bbl automatic transmission with A/C

Fig. Fig. 15: Vacuum hose routing-1969 302 2bbl manual transmission

Fig. Fig. 16: Vacuum hose routing-1969 351 without A/C

Fig. Fig. 17: Vacuum hose routing-1969 351 with A/C

Fig. Fig. 18: Vacuum hose routing-1969 302 and 390 2bbl, automatic transmission, with A/C

Fig. Fig. 19: Vacuum hose routing-1969 390 4bbl, manual transmission

Fig. Fig. 20: Vacuum hose routing-1969 390 4bbl, automatic transmission

Fig. Fig. 21: Vacuum hose routing-1969 427 4bbl, with air pump and without A/C

Fig. Fig. 22: Vacuum hose routing-1969 428 Cobra jet with Ram Air, manual transmission

Fig. Fig. 23: Vacuum hose routing-1969 428 Cobra jet without Ram Air, manual transmission and air pump

Fig. Fig. 24: Vacuum hose routing-1969 428 Cobra jet with Ram Air, automatic transmission and air pump

Fig. Fig. 25: Vacuum hose routing-1969 428 Cobra jet without Ram Air, automatic transmission and air pump

Fig. Fig. 26: Vacuum hose routing-1969 429 4bbl, manual transmission

Fig. Fig. 27: Vacuum hose routing-1969 429, automatic transmission

Fig. Fig. 28: Vacuum manifold assembly on the firewall-1970 models

Fig. Fig. 29: Vacuum hose routing-1970 200, without ported vacuum switch

Fig. Fig. 30: Vacuum hose routing-1970 200, with ported vacuum switch

Fig. Fig. 31: Vacuum hose routing-1970 200, with electronic distributor modulator

Fig. Fig. 32: Vacuum hose routing-1970 250, without ported vacuum switch

Fig. Fig. 33: Vacuum hose routing-1970 250 with ported vacuum switch

Fig. Fig. 34: Vacuum hose routing-1970 302 2bbl without ported vacuum switch

Fig. Fig. 35: Vacuum hose routing-1970 302, 351W 2bbl, with 3-hose ported vacuum switch

Fig. Fig. 36: Vacuum hose routing-1970 302, 351W 2bbl, with ported vacuum switch

Fig. Fig. 37: Vacuum hose routing-1970 302 2bbl, with electronic distributor modulator

Fig. Fig. 38: Vacuum hose routing-1970 302 2bbl, with ported vacuum switch and air pump

Fig. Fig. 39: Vacuum hose routing-1970 351C 2bbl, with 3-hose ported vacuum switch

Fig. Fig. 40: Vacuum hose routing-1970 351C, with ported vacuum switch

Fig. Fig. 41: Vacuum hose routing-1970 351C Ram Air, with 3-hose ported vacuum switch

Fig. Fig. 42: Vacuum hose routing-1970 302, with ported vacuum switch

Fig. Fig. 43: Vacuum hose routing-1970 428 4bbl without Ram Air, with single diaphragm distributor

Fig. Fig. 44: Vacuum hose routing-1970 428 4bbl Ram Air, with 3-hose ported vacuum switch

Fig. Fig. 45: Vacuum hose routing-1970 428 4bbl without Ram Air, with dual diaphragm distributor

Fig. Fig. 46: Vacuum hose routing-1970 429, with single diaphragm distributor

Fig. Fig. 47: Vacuum hose routing-1970 429, with dual diaphragm distributor and ported vacuum switch

Fig. Fig. 48: Vacuum hose routing-1970 429, with dual diaphragm distributor and 3 hose ported vacuum switch

Fig. Fig. 49: Vacuum hose connectors-1971 models

Fig. Fig. 50: Vacuum hose routing-1971 250, without ported vacuum switch

Fig. Fig. 51: Vacuum hose routing-1971 250, with ported vacuum switch

Fig. Fig. 52: Vacuum hose routing-1971 250, with electronic distributor modulator, without ported vacuum switch

Fig. Fig. 53: Vacuum hose routing-1971 250, with electronic distributor modulator and ported vacuum switch

Fig. Fig. 54: Vacuum hose routing-1971 302, with spark delay valve, without ported vacuum switch

Fig. Fig. 55: Vacuum hose routing-1971 302 2bbl, with spark delay valve, dual diaphragm distributor and 3 hose ported vacuum switch

Fig. Fig. 56: Vacuum hose routing-1971 302, without ported vacuum switch, with dual diaphragm distributor

Fig. Fig. 57: Vacuum hose routing-1971 302 and 351W, with 3 hose ported vacuum switch

Fig. Fig. 58: Vacuum hose routing-1971 302 and 351W, with ported vacuum switch

Fig. Fig. 59: Vacuum hose routing-1971 302 with 3 hose ported vacuum switch

Fig. Fig. 60: Vacuum hose routing-1971 Boss 302

Fig. Fig. 61: Vacuum hose routing-1971 351C, without ported vacuum switch

Fig. Fig. 62: Vacuum hose routing-1971 351C 2bbl, with single diaphragm distributor and 3 hose ported vacuum switch

Fig. Fig. 63: Vacuum hose routing-1971 351C with 3 hose ported vacuum switch

Fig. Fig. 64: Vacuum hose routing-1971 351C 2bbl, with ported vacuum switch

Fig. Fig. 65: Vacuum hose routing-1971 351C 4bbl, without ported vacuum switch

Fig. Fig. 66: Vacuum hose routing-1971 351C 4bbl Ram Air, with ported vacuum switch

Fig. Fig. 67: Vacuum hose routing-1971 351C 4bbl, with 3 hose ported vacuum switch

Fig. Fig. 68: Vacuum hose routing-1971 351 Boss

Fig. Fig. 69: Vacuum hose routing-1971 429, with 3 hose ported vacuum switch (single diaphragm distributor)

Fig. Fig. 70: Vacuum hose routing-1971 429, with 3 hose ported vacuum switch (dual diaphragm distributor)

Fig. Fig. 71: Vacuum hose routing-1971 429, ported vacuum switch

Fig. Fig. 72: Vacuum hose routing-1971 429, with electronic distributor modulator

Fig. Fig. 73: Vacuum hose routing-1971 429 Cobra Jet and Super Cobra Jet

Fig. Fig. 74: Vacuum hose routing-1972 250, with transmission regulated spark

Fig. Fig. 75: Vacuum hose routing-1972 250, with electronic spark control and spark delay valve

Fig. Fig. 76: Vacuum hose routing-1972 250, with 3 hose ported vacuum switch and spark delay valve

Fig. Fig. 77: Vacuum hose routing-1972 250, with 3 hose ported vacuum switch

Fig. Fig. 78: Vacuum hose routing-1972 250, without ported vacuum switch

Fig. Fig. 79: Vacuum hose routing-1972 250, with spark delay valve

Fig. Fig. 80: Vacuum hose routing-1972 250, with electronic spark control and spark delay valve

Fig. Fig. 81: Vacuum hose routing-1972 302 2bbl, with 3 ported vacuum switch and electronic spark control

Fig. Fig. 82: Vacuum hose routing-1972 302 2bbl, with 3 ported vacuum switch and electronic spark control

Fig. Fig. 83: Vacuum hose routing-1972 302 2bbl, with 3 ported vacuum switch, spark delay valve and electronic spark control

Fig. Fig. 84: Vacuum hose routing-1972 302 2bbl, with ported vacuum switch and spark delay valve

Fig. Fig. 85: Vacuum hose routing-1972 302 2bbl, with ported vacuum switch and electronic spark control

Fig. Fig. 86: Vacuum hose routing-1972 302 2bbl, with electronic spark control and no ported vacuum switch

Fig. Fig. 87: Vacuum hose routing-1972 302 2bbl, with spark delay valve and no ported vacuum switch

Fig. Fig. 88: Vacuum hose routing-1972 302 2bbl, with spark delay valve and electronic spark control

Fig. Fig. 89: Vacuum hose routing-1972 351W 2bbl, with ported vacuum switch and transmission regulated spark

Fig. Fig. 90: Vacuum hose routing-1972 351W 2bbl, with ported vacuum switch, spark delay valve and transmission regulated spark

Fig. Fig. 91: Vacuum hose routing-1972 351W 2bbl, with 3 hose ported vacuum switch and transmission regulated spark

Fig. Fig. 92: Vacuum hose routing-1972 351W 2bbl, with 3 hose ported vacuum switch, spark delay valve and transmission regulated spark

Fig. Fig. 93: Vacuum hose routing-1972 351C 2bbl, with 3 hose ported vacuum switch

Fig. Fig. 94: Vacuum hose routing-1972 351C 2bbl, with 3 hose ported vacuum switch and electronic spark control

Fig. Fig. 95: Vacuum hose routing-1972 351C 2bbl, with ported vacuum switch

Fig. Fig. 96: Vacuum hose routing-1972 351C 2bbl, with ported vacuum switch and electronic spark control

Fig. Fig. 97: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, spark delay valve and ported vacuum switch

Fig. Fig. 98: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, spark delay valve and 3 hose ported vacuum

Fig. Fig. 99: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, electronic spark control and using manifold vacuum

Fig. Fig. 100: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, electronic spark control, 3 hose ported vacuum switch and using manifold vacuum

Fig. Fig. 101: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, spark delay valve, Ram Air, and using manifold vacuum

Fig. Fig. 102: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, 3 hose ported vacuum, spark delay valve, Ram Air, and using ported vacuum

Fig. Fig. 103: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, electronic spark control, Ram Air, and using manifold vacuum

Fig. Fig. 104: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, 3 hose ported vacuum, electronic spark control, Ram Air, and using manifold vacuum

Fig. Fig. 105: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, spark delay valve, NASA Ram Air, and using ported vacuum

Fig. Fig. 106: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, 3 hose ported vacuum, spark delay valve, Ram Air, and using ported vacuum

Fig. Fig. 107: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, electronic spark control, NASA Ram Air, and using manifold vacuum

Fig. Fig. 108: Vacuum hose routing-1972 351C 4bbl, with single diaphragm distributor, 3 hose ported vacuum, electronic spark control, NASA Ram Air, and using manifold vacuum

Fig. Fig. 109: Vacuum hose routing-1972 351C 4bbl, with dual diaphragm distributor, distributor vacuum deceleration valve, NASA Ram Air, and using ported vacuum

Fig. Fig. 110: Vacuum hose routing-1972 351C 4bbl, with dual diaphragm distributor, 3 hose ported vacuum, distributor deceleration valve, NASA Ram Air, and using ported vacuum

Fig. Fig. 111: Vacuum hose routing-1972 351C 4bbl, with dual diaphragm distributor, distributor vacuum deceleration valve, Ram Air, and using ported vacuum

Fig. Fig. 112: Vacuum hose routing-1972 351C 4bbl, with dual diaphragm distributor, 3 hose ported vacuum, distributor deceleration valve, NASA Ram Air, and using ported vacuum

Fig. Fig. 113: Vacuum hose routing-1972 351C 4bbl, with dual diaphragm distributor, 3 hose ported vacuum, distributor deceleration valve, and using ported vacuum