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Original Stiction Eliminator will stop excessive black smoke and bucking and chugging on cold starts. Stiction Eliminator not only cleans injectors but other parts of the engine as well, including the turbocharger. Stiction Eliminator will also fortify your existing oil and help it to work more effectively. When used in conjunction with Diesel Extreme (fuel additive), your engine will regain its original performance power.
ACTIZYME works but it can take a couple of days and l have only seen it used on S trap blockages. It would have to be flushed past the trap in your case. From your description, the blockage is in the 100 mm pipe and it would take a huge dump and a hell of a lot of toilet paper to block it.