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black smoke = fuel
as long as the sensors are working, (iat, cts etc...)
It goes
MAF -> ECU -> INJECTORS
its a very simple engine. So you are looking for something that has to do with one of those 3 things
If a sensor is bad that's different. So check your sensors, check compression, basic diagnostics, then look for an issue with the maf wiring or maf plumbing or fuel pressure or ecu grounds or ecu connection (the harness to ecu) stuff like that
the sudden onset makes me think wiring related. But a bad sensor can do that too (goes 'bad' internally is a wiring short)
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