running rich and overheat

[sk8kei]

My HC/CO/NO are extremely high...CO hit around 2.18, NO--1820 on 15mphIn 25mph test is about the same. Also the 240sx(Ka24de) the temperature goes above the normal temp after 30min or an hour's driving. Any suggestion what I should check concerning on the overheat problem

[hpdrumakk]

check your cooling system, make sure the radiator is clear and not obstructed, if the coolant looks nasty it should probably flushed by a shop, take off the radiator cap and look for bubbles or white smoke from the exhaust (if so its a blown head gasket), check ignition timing, if nothin comes up check ur exhaust system and make sure the catalytic converter didnt melt and clog it up (happened to mine).... along w/ retarding ignition timing, running rich is the ecu's solution to overheating.... so fix the overheating problem the rich fuel condition should go away too....