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Thanks in advance for any feedback. I have a 1992 Honda civic cx (d15b8) non vtec.. When the car is cold the idle is perfect however as soon as it warms up all the way and I come to a complete stop the idle will drop down, sometimes to the point where it's going to stall out. Usually when I turn the ac/heat on the idle will fix itself.. Any ideas? Also I have high nitrgoen oxide levels, maybe that has something to do with it? The car does not have a egr valve, I have changed the thermostat, did a seafoam treatment, tried switching the gas up, oil change, spark plugs, none of this seemed to help, any ideas?
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