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Mercedes Sprinter 212D swb 2874cc V reg
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Discussion Starter · #1 ·
I am experiencing a very odd problem with the fueling on my V reg 2874cc Diesel Sptinter. On a partial throttle it will begin to knock slightly and produce black smoke . If you do not change the throttle position it builds and gets progressively worse. Under load its absolutely fine. Engine has had regular maintenance and has only done 90.000m . It has been on a diagnostic machine and is showing no fault so I presume that it is something to do with the fuel pump but would appreciate some advice from someone with some experience.
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