NCT Manual. - National Car Testing Service

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3 NATIONAL CAR TEST (NCT) MANUAL 2012 EXHAUST CO/HC/LAMBDA (This item does not apply to vehicles registered before 1st January 1980) ITEM Engine Exhaust System 1 Leaking. REASONS FOR FAILURE Emission Control System Idle Speed Carbon Monoxide Emission Hydrocarbon (H.C.) Lambda Exhaust Emissions 2 Emission control system leaking, incomplete or incorrectly assembled. 3 Obviously outside vehicle manufacturer’s recommendations (± 100 rpm or ±10%of manufacturer’s stated speed whichever is greater.). 4 Carbon monoxide emission is is not in accordance with the vehicle manufacturer’s standard or for vehicles first registered before 1st day of October 1986, the carbon monoxide content is more than 4.5% at idling speed. 5 For vehicles first registered on or after 1st day of October 1986, up to 31st December 1993, the carbon monoxide content at idling speed is more than 3.5%. 6 For vehicles first registered on or after 1st day of January 1994, the carbon monoxide content at idling speed is more than 0.5%. 7 For vehicles first registered on or after 1st day of January1994, the carbon monoxide content at 2,500 rpm or at a speed specified by the vehicle manufacturer is more than 0.3%. 8 For vehicles first registered on or after 1st day of July 2002 the carbon monoxide at idling speed is more than 0.3%. 9 For vehicles first registered on or after 1st day of July 2002 the carbon monoxide content is more than 0.2% by volume at either an engine speed of 2500 rpm or at a speed specified by the vehicle manufacturer. 10 Hydrocarbon emission is is not in accordance with the vehicle manufacturer’s standard or for vehicles first registered before 1st October, 1986, the hydrocarbon content at idling speed is more than 1,000 ppm. 11 For vehicles first registered on or after 1st day of October 1986, up to 3 1st December1993, the hydrocarbon content at idling speed is more than 750 ppm. 12 For vehicles first registered on or after 1st day of January 1994, the hydrocarbon content at 2,500 rpm or at a speed specified by the vehicle manufacturer is more than 200 ppm. 13 For vehicles first registered on or after 1st day of January 1994, the lambda value at 2,500 rpm or at the speed specified by the vehicle manufacturer is not 1 ± .03 or within the vehicle manufacturer’s recommendation. 14 Excessive exhaust smoke likely to affect other road users. 14
NATIONAL CAR TEST (NCT) MANUAL 2012 3 EXHAUST CO/HC/LAMBDA ITEM REASONS FOR FAILURE Note: For kit cars built before 1st January 2000, use the pre-1994 emissions standards. Where a kit car is presented for a test, a declaration is required from an automotive Engineer/Assessor stating the make, year of manufacture of the engine, and the exhaust emission values stated by the engine manufacturer. The ‘date of first registration’ will be used to provide the test standard. If the test centre manager has information to prove that the car was built to a less stringent standard (such as indicated by the ‘year of manufacture’), he may pass the car if it would have passed the less stringent standard. If the engine has been changed, apply the standards to which the car was originally built, not the year of manufacture of the engine. For cars fuelled by CNG (Compressed Natural Gas) do not apply a HC standard. This will prevent false failures from excessive methane emissions. The HC (hydrocarbon) will only be checked at high idle on cars equipped with catalytic converters. Imported and used vehicles first registered after 1994 that are not fitted with a catalytic converter should be tested against pre-1995 values. 15
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Page 4 and 5: Contents Page Item No Page Item No
Page 6 and 7: 6 NATIONAL CAR TEST (NCT) MANUAL 20
Page 10 and 11: 2 EXHAUST SMOKE (DIESEL) NATIONAL C
Page 20 and 21: 8 HORN NATIONAL CAR TEST (NCT) MANU
Page 22 and 23: 10 GLASS NATIONAL CAR TEST (NCT) MA
Page 24 and 25: 10 GLASS Schedule 1 Country in whic
Page 26 and 27: 10 GLASS NATIONAL CAR TEST (NCT) MA
Page 30 and 31: 14 STEERING WHEEL PLAY NATIONAL CAR
Page 38 and 39: 21 SERVICE BRAKE PERFORMANCE NATION
Page 42 and 43: 25 TOWING BRACKET/COUPLING NATIONAL
Page 44 and 45: 27 REAR LAMPS NATIONAL CAR TEST (NC
Page 48 and 49: 31 HEADLAMP AIM NATIONAL CAR TEST (
Page 52 and 53: 32 AUXILIARY LAMP CONDITION AND POS
Page 54 and 55: 33 AUXILIARY LAMP AIM NATIONAL CAR
Page 56 and 57: 35 BODYWORK NATIONAL CAR TEST (NCT)
Page 58 and 59: 35 BODYWORK NATIONAL CAR TEST (NCT)
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39 WHEELS NATIONAL CAR TEST (NCT) M
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41 NATIONAL CAR TEST (NCT) MANUAL 2
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42 CHASSIS/UNDERBODY NATIONAL CAR T
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43 STEERING LINKAGE NATIONAL CAR TE
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46 FRONT SUSPENSION NATIONAL CAR TE
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47 BRAKE LINES/HOSES NATIONAL CAR T
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49 ELECTRICAL SYSTEM NATIONAL CAR T
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54 EXHAUST SYSTEM/NOISE NATIONAL CA
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56 REAR SPRINGS NATIONAL CAR TEST (
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57 TRANSMISSION & DRIVE TRAIN NATIO
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59 REVERSE LAMP(S) NATIONAL CAR TES
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61 REGISTRATION PLATE LAMPS NATIONA
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