Leading auto parts company Denso Corp. identified a major cause behind defective fuel pumps ... bloating problem. That led to the impeller coming in contact with the surrounding pump case.

GM used the pump on its 6.6-liter LGH and LML Duramax diesel engines through 2016, opting to use the Denso HP4 pump ... with codes related to fuel pressure problems. Before you start removing ...

Denso and Daihatsu belong to the Toyota ... Transport ministry officials said defects in the plastic impeller in the fuel pump led to problems in sending fuel to the engine. In the worst-case ...