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1986 Nissan Truck

1986 Nissan Truck 4 cyl Four Wheel Drive Manual

My truck failed emissions. CO's were 39.49 and applicable standards are 25.00. What can I check for, new vac. Lines, plugs & wires fuel filter
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Texaz69
June 24, 2010.



Could be the coolant temperature sensor or the oxygen sensor not going into closed loop mode giving fuel when not needed. To include a leaky injector or pressure regulator that will make run rich at all times.

Rasmataz
Jun 24, 2010.