dumping fuel

88 nissan maxima. It is dumping fuel. A friend put new injectors in it but it did not fix the problem. Thinks it might be a sensor or computer problem. It has black smoke coming from it. Has a real rich smell to it. Still has power. Won't idle Costs about $10 to drive 2 or 3 miles.
HELP!!!!

Check to see if the ECU (under the passenger seat) is flashing any errors...it might tell you where the problem is.




88 nissan maxima. It is dumping fuel. A friend put new injectors in it but it did not fix the problem. Thinks it might be a sensor or computer problem. It has black smoke coming from it. Has a real rich smell to it. Still has power. Won't idle Costs about $10 to drive 2 or 3 miles.
HELP!!!!