d16z6 vtec
help me about any proplem may cause that
first i have check engine code (o2 sensor)
i have changed my air filtert and fuel filter & spark plugs (iridium ngk)
my exhuast system never changed from the year i bought my car 1992
i also cleaned my fuel injectors what to do else ?
heeeeeeeeeeeeeelp please

 

Replace the O2 sensor.

If the exhaust is rotted out, replace it.

That will help.

 

set ignition timing properly