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NCT exhaust emissions fail

  • 18-09-2017 08:56PM
    #1
    scientific2
    Registered Users, Registered Users 2 Posts: 6 ✭


    Hi all,

    The father brought in an 02 punto for the test today and it failed on two exhaust emissions.
    Number 1: "emission test not done" as "coolant leaking" and number 2: "exhaust system/noise(54)" due to "exhaust assembly leaking" was the second fail.

    I dont know where the hole in the exhaust is so will get it fixed at the garage, as i presume its a hole and nothing else maybe? The lambda on high idle was 3.42 and should be between 0.97 and 1.03.
    The coolant leaking is baffling me as the temperature hand is normally halfway but sometimes (especially when idle) goes up to 3/4 way and the fan is on for a while but the overheating light never comes on. There is no sign of oil in the coolant and the oil itself is very clean so dont think its the headgasket. When I turn on the heating in the car it is hot for around 30seconds then goes cool/cold for a few mins and then slightly hot again, so could it be a thermostat and not a leak in the coolant system. I have noticed no leak in the coolant so dont know what the NCT man means by the coolant leaking. The gentleman said to bring it to the gararge nearby to get water put into it but the reserve hadnt lost any water since leaving home to the nct centre but when the father opened the reserve tank some water bubbled out with steam - after leaving it cool he topped it up even though it took only a small bit to top backup to the max line which he maintains had bubbled out and wasnt leaked.
    I have attached picture of fail report.
    Any ideas - many thanks!


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