Dometic lw 3000 generator idles rough with a puff of black smoke smoke
Exhaust black smoke
The main causes of exhaust pipe blackening are less air in the cylinder, more fuel, incomplete or untimely combustion of fuel. Therefore, when checking and analyzing faults, look closely around this point to find out reasons. Check cylinder by using the method of oil cut, the first distinction is that the individual cylinder is not working well or all cylinders are not working well. If the black smoke disappears when a cylinder stops working, then the black smoke is caused by the bad work of individual cylinders. The reasons can be found from the bad work of individual cylinders.
The main reasons are:
A. Poor nozzle operation
The injection pressure of the injector is too low, the nozzle drips oil, the spray quality is not good and the oil droplet is too strong, all of which will cause the diesel fuel to burn incompletely. Therefore, in the detection of diesel engine cylinder knocking sound, exhaust sound uneven, that is, fuel injection problems, should be immediately checked and adjusted injection nozzle.
B. The fuel injection pump adjusts the tooth rod or the adjustment rod stroke is too large, resulting in too much fuel supply.
C. Valve clearance does not meet requirements, resulting in insufficient air intake.
D. The contact surface between the plunger sleeve of the injection pump and the valve seat is not sealed, or the locking screw of the regulating ring of the fuel injection pump or the loosening of the plunger adjusting arm cause the imbalance of the fuel supply and lead to intermittent black smoke emission.
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on May 29, 2020