Engine Mechanical problem
1986 Other Nissan Models 4 cyl Front Wheel Drive Manual 195000 miles
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my Nissan Micra has 195000 kms on it it was tested today ..On idle test Hydrocarbons max allowable was 409 my car read 2000 so it failed..Carbon minoxide test max allowable 4.61 vehicle reading 2.61 so it passed..I had changed the oil and put in 94 octane Chevron gas..now this is where it gets strange on the test on March 15 2008 hydrocarbons max allowable as abone 409 my reading 336 passed, and then on Carbon minoxide 4.61 max and my reading was 5.05....so Im really confused on this one can you help me with some advise on why the idle test the readings would be reversed...Im scratching my head