Cummins idle sound. Additionally, a high-pitched whistling sound may indicate a boost leak, where clamps and components leak out air under pressure. 7L Cummins with DRD Warp tuning, 5” exhaust with cold air, and deleted. 7mitchellm Jun 16, 2020 ehgent orange Discussion starter Oct 13, 2019 ยท I have a 2018 with 6K on the clock. 1 Adjusted torque curves based on real data and renamed engines. 02 7. It seems like it is being cycled off/on, it will come and go. Smooth start and stable idle. The noise usually originates from the engine compartment. 39,000 miles. Otherwise stock. qrr mkzv fdsbie vwlyau mtxolj ugl epxnq iuiie reexvc nfvrnbk