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Message: <blockquote data-quote="Tazza" data-source="post: 139289" data-attributes="member: 82">I'm surprised the pump worked on the V2203, unless someone had changed the engine from a v1702 to a 2203. Did you check your injection timing was right? this can be a cause of smoke.Keep in mind, diesels do not run rich or lean like petrol/gas engines do. Sure, there are air/fuel ratios that you want to keep it running within, but a diesel pulls in a full charge of air every stroke, not throttled like a petrol engine with a butterfly does. The engine draws in a charge of air, the amount of fuel sprayed in dictates how much BOOM you get. Now, if there is too much fuel for the air charge, it does not burn clean, you get black smoke.If your timing is off, fuel will be not burning right, the shims under the pump dictate the timing, add more and the injection is delayed, remove them and it's advanced.</blockquote>