We are having a problem with emission test for our ve.� It seems we have an aftermarket02 sensor with only 2 wires instead of 3.� We have been advised to get a new catolitic converter and get another o2 sensor.� Expensive and lots of work.� We have tried adjusting the engine useing an adative and it varies from pass to fail or fail to pass but not pass pass on both areas
the first fail was in idle and only off 5 points(too high)
HELP any ideas??
Sallye and Pete Clark