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Black smoke is fuel. Sounds like your choke is stuck on or if you have not changed your air filter in ages it could be real dirty so the fresh air won't get into your carb. I have seen filters so dirty the engine actually choked itself to *****. Is your check engine light on? You could have a bad fuel sensor or air flow sensor. That would do it as well. If you are driving with black smoke your gas mileage will be poor also.
Have it tested with a scan tool ,check engine sensor data parameters ! Possible dirty or bad mass air flow sensor ,O2sensor ,Coolant temp sensor, map sensor etc... Check for vacuum leaks , Plugged fuel injectors , dirty throttle plate , also check fuel pressure . Is your check engine light lit ?
code p0238 refers to manifold absolute pressure (MAP) sensor A TC system --high input===causes --wiring short to positive --MAP sensor---ECM
Replace the sensor (internal fault)
code p0102 refers to mass air flow (MAF) sensor /volume air flow (MAV) sensor --low input ===causes wiring short to ground ---MAF/VAF sensor
again the MAF is implicated as faulty
code po113 refers to intake air temperature (IAT) sensor--circuit malfunction===causes --wiring open circuit/short to positive --wiring short to ground --ground wire defective---IAT sensor---ECM
Now looking at all the codes the most common fault is wiring damaged so pay particular to the condition of the wiring loom --the condition of the connections --clean pins - pins not bent --water in the connections . IT is common that when disconnecting the units that the connection is pulled apart by pulling on the wires .. This check is the cheapest before any money is spent on the rest . Do not clean but replace because if cleaning does not produce a result you still do not know if you cleaned it properly or if it is faulty
It is a generic OBD2 power train Code. The same solution could be applied to all other vehicles as well. Error Code:P0171 Description:
Fuel Trim (FT), System too Lean, Bank 1 Possible Causes:
- Fuel pump pressure too high or regulating valve stuck closed.
- Intake/ exhaust leak.
- Secondary air injection (AIR) system.
- Manifold absolute pressure (MAP) sensor.
- Mass air flow (MAF) sensor.
- Fuel pressure/pump.
- Fuel Injector(s).
- Evaporative emission (EVAP) canister purge valve.
- Heated oxygen sensor (HO2S). Solutions:
-Usually, simply cleaning the Mass air flow (MAF) sensor helps solve the problem.
- It is best to take MAF off and spray it with electronics cleaner or high flash point solvent.
- Inspect all vacuum and PCV hoses, replace if necessary.
- Check for a dirty fuel filter and proper fuel pressure.
Perform an ODBII scan and look for a Mass Air Flow sensor fault. The pop you heard was most likely a back fire and could have damaged the MAF sensor. A bad MAF sensor can result in overly rich (black smoke) fuel mapping. Pull the intake duct off of the turbo and see if the impellor will spin freely by turning it with your finger. Do you have boost pressure on the dash gauge?
Check the following:- Map sensor, Air flow sensor if fitted instead of map sensor and the engine coolant temp. sensor. When did you last replace the air filter?
try cleaning the mass air flow sensor with brake or carb cleaner the sensor is located after the air filter and also check your air filter if dirty replace. good luck.
there are many different things that can give you a lean fuel mixture. you could have a bad o2 sensor, mass air flow sensor, a plugged fuel filter or dirty air filter. any of these things or combination of can cause thee type codes.
black,and smells like un burnt disel
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