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|All Messages in Thread||Author||Date|
|Black smoke, raw fuel, down on horsepower||joe murray||11-14-02|
|8v92 Detroit diesel engine|
My husband just drove the bus RV to Arizona from Detroit area. He
had continuous black smoke, which was heavy under throttle, it was
down on horsepower and raw fuel was spitting out the pipe.( It was on
the back of the bus and the driver side of the 25' cargo trailer he
He is going to a Detroit diesel place in Yuma, but would like to have
some idea of what is happpening before going there. Can anyone give
an opinion from those symptoms?
Also we just had new batteries installed and suppossively the system
checked - but - the motor is not charging the battery. The battery
charges on the generator. He had to have the generator running the
last 1000 miles. Is there a regulator or other device that could be
failing? Any thoughts would be greatly appreciated.
|Re: black smoke, raw fuel, down on horsepower||Joe||11-15-02|
|Raw fuel sounds to me like somehow one or more tips has burned off the injectors. This is only a guess as without hearing it run it is impossible to tell what it is doing. There is also a possibility the turbo has siezed and the raw fuel is actually motor oil. If the injectors have burned off the tips, the fuel will contaminate the engine oil and the level will rise above the full mark. |
As far as the not charging, I would have the wires checked to see if something wasn't left off during the battery installation.
|Re: black smoke, raw fuel, down on horsepower||Richard Ames||11-18-02|
|Anything form a dirty clogged air filter, to bad injectors, out of time fuel pump, blown turbo etc.|
|Re: black smoke, raw fuel, down on horsepower||Joe||11-19-02|
|There is no pump timing on that type of Detroit Diesel. It uses a gear pump to supply fuel to the injectors whish are individually timed.|
|Re: black smoke, raw fuel, down on horsepower||Jon W.||12-4-02|
|A broken turbo inlet pipe (engine exhaust into turbo) would cause the black smoke and loss of power or a cracked or broken exhaust manifold.|
Easy to confirm: the crack or break should be visible and if that is the cause there will be a lot of sooting inside engine compartment.