- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Yes, the engine is being overfuled if blowing black smoke. Possible internal leak of fuel pressure regulator. Possible sticking/stuck EGR valve. Possible computer supplying more fuel due to a sensor supplying false information. A scan tool will be required to determine if one or more sensors is supplying erratic info
Typically this is due to a vacuum leak. (Yes, it could be tons of other things like the timing, fuel flow, etc. - but let's cover the easy stuff first).
There's enough power to keep the engine running, but once in gear the resistance of the torque converter kills the engine.
There are numerous little black hoses under the hood - about soda straw thickness. Look for any that have become disconnected or are brittle and may have broken.
You can also light an incense stick and pass it all over the area above the engine while it is idling, looking for anywhere that either sucks in smoke or blows against it.
When you find a disconnected hose, try to find a nipple to push it back on to.
You may also find a nipple or hole on the engine that is sucking in the incense smoke, but can't find a hose to attach to it. Just clean off the metal as well as you can and put a piece of black electrical tape over it and see if that makes the engine run better.
There are several causes for this, including the above.
Check the spark plugs and coils/wires. Lose or worn parts can cause this. If the spark plugs have thick black residue, you have an oil leak. A flat black powdery residue is too much air. A thick crusty white/yellowish residue would be a coolant leak.
If it is blowing blue or white smoke when running, the you have an oil (blue) coolant (white) leak that needs to be fixed. Normal smoke is grayish in color.
Check all the vacuum lines as a leak may be the problem.
i believe the engine is running too lean as if it was running too rich it would blow black smoke If it was blue smoke it is oil related eg valve stem seals,valve guides and or piston rings all of these things will create blue smoke if one of the above is worn out
If the engine idles for a while then blows blue smoke this is an indication of oil passing the valve stem seals and being burnt in the combustion process. ( When you are at lights and they change and you accelerate away leacing a cloud of blue smoke this is worn valve guides and failed valve stem seals) As for the idle it could be the oxygen sensor is coated with oil and soot and is malfunctioning henace the cpu cannot regulate the fuel setting correctly. Have the valve seals replaced and clean the Oxygen sensor and check for other fault codes
Dose it run on all cylinders or run rough when idling or jerking when taking off or engine getting hotter than it used to, when going from gear to gear dose it pull as good as before,do you use any oil in 1000 km's or coolant ,dose the exhaust blow black smoke or blue smoke .
IS IT A DIESEL as all these things come in to it plus air filter bunged up ,air leak in intake manifols ,fuel filter or fuel pump needs checking and or replacing ,.
Without seeing it we can only say what it could be.
So let me know how you get on.
Blue smoke is an indication that you are burning oil. This typically happens through the rings on the pistons but can also be caused from valves. If the vehicle is running ok then it is most likely blowing by the rings. The vehicle probably has high miles and the way to stop the blue smoke is replacing the rings which can get very expensive. This does not mean that the vehicle will tear up tomorrow though.
Black Engine running rich Possible Failure
-Map sensor, fuel injector or fuel pressure regulator.
Blue -Replace Faulty Transmission modulator valve
White Possible Failure. -Head gasket.
Hope this tip helps.