After apprx. 10miles the engine coughs and dies. It will crank but wont start there was black smoke sometimes as it died. Then after cooling down will start and may run for ten or twenty miles. This repeated several times then the engine quit and a burning smell was noticed and the engine would not run again. The computer and the altitude sensorr were found defective and replaced. After approximately 1000 miles
the problem seems to have reappeared.
Probable causes of an engine running rich are as follows: 1. Excessive fuel pressure can be cause by restricted fuel return line
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.