Fault Code P1664 related to the fuel pump and fuel pressure include: - loss of power - acceleration problems - engine sputtering at high speed - engine not starting - engine stalling - problems starting the car
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black smoke is over fueling and although the turbo appears to spin ok the vale variation actuator may not be operating correctly
there are vanes in the exhaust turbine housing that are altered to increase the exhaust gas flow onto the turbine blades for quicker acceleration and these vanes are operated by a vacuum actuator and rod by a sensor
the vanes are subject to extreme heat and can rust stuck open or the hose gets hard and cracks
s not allowing the vanes to work
I would be concentrating in this area before the EGR valve
run the fault codes as well to get a better idea of the possible fault as some systems only put the light on for extreme conditions in engine and transmission
the cause of the heavy black smoke is un-burnt fuel. is from excessive fuel pressure, faulty injectors,ignition timing out. If it is a turbo operation then the turbo is not producing the correct boost for the fuel settings . Check turbo for vane actuation . low power comes from overfuelling, low air flow. run the fault codes to see which sensors are out of parameter.
black smoke is flooding( uncontrolled injector operation
run the fault codes to determine the problem area ( ECM , fuel pressure , faulty injector control, MAF/VAF sensors or failed heated oxygen sensors
Unless there are warning lights indicating some sort of mechanical malfunction I would not worry about this. If this were a gasoline engine it would be disconcerting. Diesels on the other hand are more prone to producing soot, and in recent years have come under attack for this reason. The reason this happens is that when you are accelerating hard you are forcing more fuel to be burned in each firing cycle. Soot is simply the product of inefficient combustion.
hello,according to service information;smoke formation or si 07.16-p-0004a (service inform) from mb ,your engine have normal function,if you want ,ask your dealer about the service inform with number 07.16-p-0004a,you can read the explanation regarding your problem,ty
Black smoke is almost always an indication that the air/ fuel mix (ratio), is too rich. I would try to find out if the just cleaned the injectors or were they replaced. Cleaning injectors and sometimes leave irregularly shaped orifices. Besure the air filter is clean. This can effect mix also.
Good Luck and hope this helps.