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CP4 Pump: Which Diesel Engines Use It And Why Is It So Problematic?
While DIY replacement of the CP4 injection pump and associated fuel system components is possible ... If your truck is powered by an LML Duramax or 6.7L Cummins, you could replace the CP4 pump ...
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What Year Did Cummins Engines Have The P-Pump?
Other changes to the Cummins to meet the emission standards ... P-pump manages the cylinder pressure by injecting fuel. The P7100 injection pump keeps proper time to the engine by phasing pump ...