My sons 94 exploer v-6 will crank and idle perfect for 3-4 minutes, then CHECK ENGINE light comes on and the engine will start a slight rough idle. When the idle get rough it starts putting out black smoke. Raw unburnt fuel. I have checked and regapped the plugs. Could this be O2 sensor or where else should I look? Seems like it is intermittent and light will clear itself and come back. Any ideas appreciated.
have the same problem?
Friday, January 5th, 2007 AT 1:36 PM