I have a 05 dodge cummins runs good has 156000 miles at start up it puts out a little white smoke for a minute or two. It does not matter if it is warm or cold it does it. It only does it after it sets for a few hours . No coolant lose or it does not use any oil. At first start up when it is 20 to 30 it does run a little rough but not bad. I am getting the same fuel mileage as before the smoke. What do you think might be wrong somebody told me I needed injectors
- Thread starter Mtractor
- Start date
Bill Krosnicki
Member
That doesn't sound like injectors to me. When the injectors went bad in my 06 it would make a lot of black smoke and had a loss of power. Also it would stall randomly. Seems like I need new ones about every 100,000 miles.
You say it runs rough and smokes when cold, does it start hard? I wonder if your intake pre-heater grid is working right.
You say it runs rough and smokes when cold, does it start hard? I wonder if your intake pre-heater grid is working right.
guido
Well-known Member
Hello Mtractor,
White smoke at start up is usually unburned fuel. Either you have one dripping injector while parked, or the tip is not atomizing the fuel properly. Late injection timing, on mechanically actuated injectors would have the same symptoms. Low compression on one or all cylinders is another reason for white smoke at start up. When you first start the engine up, take a reading on each cylinder's exhaust port.You may find which one or two is the problem. An infrared thermometer,no touch one, would be very handy .
Guido.
White smoke at start up is usually unburned fuel. Either you have one dripping injector while parked, or the tip is not atomizing the fuel properly. Late injection timing, on mechanically actuated injectors would have the same symptoms. Low compression on one or all cylinders is another reason for white smoke at start up. When you first start the engine up, take a reading on each cylinder's exhaust port.You may find which one or two is the problem. An infrared thermometer,no touch one, would be very handy .
Guido.
uncle henry
Member
white smoke water or condensation blue smoke fuel or turbo black smoke running good
Have you owned the truck since new? I have 98000 miles on mine and it does that too. BUT, I ran it several hundred miles on a trip to TX with one injector open too much an washed down one cylinder with too much fuel.
It does not use oil or water but one cylinder is slow in warming up due to low compression. A little more smoke on a colder day.
It does not use oil or water but one cylinder is slow in warming up due to low compression. A little more smoke on a colder day.
guido
Well-known Member
Hello uncle henry,
White smoke is not condensation, it is usually unburned fuel or coolant leak in the combustion chamber. If the smoke smalls sweet, it is coolant.
If it smells like kero, it is unburned fuel.
Blue smoke is oil going past the rings, or the valve guides, and being burned with the fuel. Blue smoke can be caused by the turbo shaft seals leaking into the intake system, and back out as blue smoke.
Black smoke is incomplete combustion, too much fuel, not enough air, low compression, late injection timing, valve adjustment,to mention a few.
Guido.
White smoke is not condensation, it is usually unburned fuel or coolant leak in the combustion chamber. If the smoke smalls sweet, it is coolant.
If it smells like kero, it is unburned fuel.
Blue smoke is oil going past the rings, or the valve guides, and being burned with the fuel. Blue smoke can be caused by the turbo shaft seals leaking into the intake system, and back out as blue smoke.
Black smoke is incomplete combustion, too much fuel, not enough air, low compression, late injection timing, valve adjustment,to mention a few.
Guido.
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