Calibration Number Identification

To identify the calibration number, find the engine code label, generally located at the front of the engine. Although there are several label styles, the engine calibration number is shown on each. Calibration codes will begin with the digit indicating the model year. For example, calibrations currently listed for 1981 Ford Vacuum Diagrams all begin with "1".

Each vehicle is also equipped with a decal containing emission control data applying to that vehicle and its engine. These decals are generally located on the underside of the hood, the radiator support, zip tube, fan shroud or other visible engine compartment location.

NOTE: Vacuum Diagrams apply to Ford models as well as to their Mercury counterparts.

Fig 1: Exhaust Emission Decal

Courtesy of FORD MOTOR CO.

Fig 2: Engine Code Label

Courtesy of FORD MOTOR CO.

Fig 3: Calibration 1-3A-R1; 1.6L; Hi. Alt. (Escort)

Courtesy of FORD MOTOR CO.

Fig 4: Calibration 1-3A-R12; 1.6L; Federal (Escort)

Courtesy of FORD MOTOR CO.

Fig 5: Calibration 1-3A-R10, 1-3A-R13; 1.6L; Federal (Escort)

Courtesy of FORD MOTOR CO.

Fig 6: Calibration 1-3C-R1; 1.6L; Federal (Escort)

Courtesy of FORD MOTOR CO.

Fig 7: Calibration 1-3C-R12; 1.6L; Federal (Escort)

Courtesy of FORD MOTOR CO.

Fig 8: Calibration 1-3C-R10, 1-3C-R13; 1.6L; Federal (Escort)

Courtesy of FORD MOTOR CO.

Fig 9: Calibration 1-3D-R10; 1.6L; Federal (Escort)

Courtesy of FORD MOTOR CO.

Fig 10: Calibration 1-3W-RO; 1.6L; Hi. Alt. (Escort)

Courtesy of FORD MOTOR CO.

Fig 11: Calibration 1-3W-R10; 1.6L; Hi. Alt. (Escort)

Courtesy of FORD MOTOR CO.

Fig 12: Calibration 1-3X-R0; 1.6L; Hi. Alt. (Escort)

Courtesy of FORD MOTOR CO.

Fig 13: Calibration 1-3X-R10; 1.6L; Hi. Alt. (Escort)

Courtesy of FORD MOTOR CO.

Fig 14: Calibration 1-4A-R12; 1.6L; Federal (Escort)

Courtesy of FORD MOTOR CO.

Fig 15: Calibration 1-4C-R10; 1.6L; Federal (Escort)

Courtesy of FORD MOTOR CO.

Fig 16: 14 Calibration 1-4C-R13; 1.6L; Federal (Escort W/A/C)

Courtesy of FORD MOTOR CO.

Fig 17: Calibration 1-4C-R13; 1.6L; Federal (Escort W/out A/C)

Courtesy of FORD MOTOR CO.

Fig 18: Calibration 1-4Q-R1; 1.6L; Calif. (Escort W/A/C)

Courtesy of FORD MOTOR CO.

Fig 19: Calibration 1-4Q-R1; 1.6L; Calif. (Escort W/out A/C)

Courtesy of FORD MOTOR CO.

Fig 20: Calibration 1-4Q-R11; 1.6L; Calif. (Escort W/A/C)

Courtesy of FORD MOTOR CO.

Fig 21: Calibration 1-4Q-R11; 1.6L; Calif. (Escort W/out A/C)

Courtesy of FORD MOTOR CO.

Fig 22: Calibration 1-4X-R10; 1.6L; Hi. Alt. (Escort)

Courtesy of FORD MOTOR CO.

Fig 23: Calibration 1-4X-R13; 1.6L; Hi. Alt. (Escort W/A/C)

Courtesy of FORD MOTOR CO.

Fig 24: Calibration 1-4X-R13; 1.6L; Hi. Alt. (Escort W/out A/C)

Courtesy of FORD MOTOR CO.

Fig 25: Calibration 1-5Q-R0, 1-6N-R0, 1-6V-R0, 1-6V-R12; 2.3L; Federal (Fairmont, Granada and Mustang)

Courtesy of FORD MOTOR CO.

Fig 26: Calibration 1-5Q-R10; 2.3L; Federal (Fairmont, Granada and Mustang)

Courtesy of FORD MOTOR CO.

Fig 27: Calibration 1-5R-R10; 2.3L; Federal (Mustang)

Courtesy of FORD MOTOR CO.

Fig 28: Calibration 1-5R-R11; 2.3L; Calif. (Mustang)

Courtesy of FORD MOTOR CO.

Fig 29: Calibration 1-6A-R10; 2.3L; Federal (Mustang)

Courtesy of FORD MOTOR CO.

Fig 30: Calibration 1-6N-R10, 1-6N-R12; 2.3L; Federal (Fairmont, Granada and Mustang)

Courtesy of FORD MOTOR CO.

Fig 31: Calibration 1-11F-R0; 3.3L; Federal (Mustang)

Courtesy of FORD MOTOR CO.

Fig 32: Calibration 1-12B-R0; 3.3L; Federal (Mustang)

Courtesy of FORD MOTOR CO.

Fig 33: Calibration 1-18B-R1, 1-18F-R1; 4.2L; Federal (Fairmont, Granada, Mustang and Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 34: Calibration 1-18C-R11; 4.2L; Federal (Fairmont and Granada)

Courtesy of FORD MOTOR CO.

Fig 35: Calibration 1-18H-R12; 4.2L; Federal (Mustang)

Courtesy of FORD MOTOR CO.

Fig 36: Calibration 1-18K-R2; 4.2L; Federal (Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 37: Calibration 1-18K-R12; 4.2L; Federal (Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 38: Calibration 1-18M-R1; 4.2L; Calif. (Fairmont)

Courtesy of FORD MOTOR CO.

Fig 39: Calibration 1-18N-R0, 1-18R-R0; 4.2L; Calif. (Fairmont, Granada and Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 40: Calibration 1-18T-R0; 4.2L; Calif. (Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 41: Calibration 1-18U-R0; 4.2L; Calif. (Fairmont)

Courtesy of FORD MOTOR CO.

Fig 42: Calibration 1-18X-R0, 4.2L; Hi. Alt. (Fairmont and Granada)

Courtesy of FORD MOTOR CO.

Fig 43: Calibration 1-18Z-R0; 4.2L; Hi. Alt. (Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 44: Calibration 1-20A-R0, Federal; 1-20N-R0, Calif., 5.0L (Fairmont)

Courtesy of FORD MOTOR CO.

Fig 45: Calibration 1-20A-R1; 5.0L; Federal (Fairmont)

Courtesy of FORD MOTOR CO.

Fig 46: Calibration 1-20B-R1; 5.0L; Federal (Fairmont)

Courtesy of FORD MOTOR CO.

Fig 47: Calibration 1-20G-R1; 5.0L; Federal (Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 48: Calibration 1-20N-R10; 5.0L; Calif. (Fairmont)

Courtesy of FORD MOTOR CO.

Fig 49: Calibration 1-20T-R0; 5.0L; Calif. (Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 50: Calibration 1-20T-R11; 5.0L; Calif. (Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 51: Calibration 1-20Z-R0; 5.0L; Hi. Alt. (Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 52: Calibration 1-22B-R0, 1-22P-R0; 5.0L; Federal (Lincoln)

Courtesy of FORD MOTOR CO.

Fig 53: Calibration 1-24R-R0; 5.8L; Calif. (Fairmont)

Courtesy of FORD MOTOR CO.