Wtf is wrong with my engine?

[Rawze]

(02-18-2019 )Nilao Wrote:  My buddies actuator failed and was doing that same thing...smoking heavily and only running up to 900 rpm in neutral with pedal floored.

yup, a turbo locked up at 100% closed will make one labor under its own exhaust back-pressure in neutral and only rev up so far + smoke real bad ( if there is no DPF to mask this). This is also very very hard on the engine and can destroy it if someone presses the fuel pedal all the way down against all the back-pressure too much when it is in this condition.

most likely a turbo issue, but also ..

just some related thoughts...

It being extremely cold outside, make sure your air can/intake/turbo/etc. is not blocked up with ice, and if its a CM870, make sure the air line feeding the turbo controller is not iced over somewhere too.

could also be a failed timing actuator, slipped injector cam, or other things that can mess up injection timing, as that is the same type of symptoms.

(for those reading this who may have similar heavy smoking problem) ..
Also, if they were to remove the oil fill cap off and see tons of smoke coming out the oil fill tube, it is also a sign that there could be a cracked piston.

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What engine model, miles, some history?