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  1. Join Date
    May 2005
    I had my 4d56 engine calibrated last week. Most of the parts of the injection pump were replaced except for the nozzle tips. Lately, I observed that there is to much fuel knock. Will replacing the nozzle tips solve my fuel knock problem. Please advise. Thank you.

  2. Join Date
    May 2006
    recheck injection pump timing

4d56 fuel knock problem