Bad mass air flow sensor, coolant temp. sensor ! Is the check engine light on ? You should have it hooked up to diagnostic scan tool , check engine sensor data parameters .
The check engine light isn't on, got a diagnostic done on it & it came back with nothing.
That still doesn't mean there can't be a problem with one of the sensors ! They don't always set codes or turn on the light! You need to take it to someone with a factory or professional grade scan tool, that knows what they are looking for !
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SOURCE: exhaust blows black on ford explorer
look for a vacume leak. black smoke means it is running very rich
SOURCE: heap of white smoke on startup but not always
White smoke usually occurs when there is not enough heat to burn the
fuel. The unburned fuel particles go out the tailpipe and typically
produce a rich fuel smell. It's not unusual to see white smoke in the
exhaust during cold weather until the engine warms up.
Faulty glow plugs or control module can cause white smoke on engine start up.
Low engine cranking speed may also produce white smoke.
If
white smoke is still visible after the engine has warmed up, the engine
may have one or more bad injectors, retarded injection timing or a worn
injection pump.
Low compression or air in the fuel system can also be a source of white smoke.
SOURCE: 2004 ford diesel blows white smoke. and drops of
look for block return lines- air leak in suction lines -block fuel line or filter - defective injection pump -inoperative glow plugs.
SOURCE: 2004 Ford F350 diesel, changed fuel filters hard starting
Pull the filters and ck for plastic or o-ring in wrong place. Something is up in the filter.
SOURCE: ford f250 diesiel sputters blows black smoke dies
youll think im crazy but change the oil and look for a oil leak, prob around the fuel filter
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