The Cummins fuel injector with part number 4940589 is a genuine OEM component primarily used in heavy-duty diesel engines, most notably in the Cummins ISX15 (2002-2017) and possibly QSX15 applications. Below is a detailed breakdown based on available data:
4940589 Key Specifications & Details
Type:
Likely an electronic unit injector (EUI) or high-pressure common rail (HPCR) injector, depending on the engine year and configuration.
Designed for precise fuel delivery and combustion efficiency.
Compatible Engines:
ISX15 (2002–2017): Used in trucks like Kenworth T680, Peterbilt 389/579, Freightliner Cascadia.
QSX15: Industrial and marine applications.
Confirm compatibility using the engine serial number (ESN) via Cummins QuickServe.
Critical Features:
Pressure Rating: Typically operates at 30,000+ PSI (HPCR models).
Electrical Connector: 4-pin or 6-pin solenoid design (varies by model).
Nozzle Type: Multi-orifice for optimal spray pattern.
Common Symptoms of Failure:
Hard starting, misfires, or rough idle.
Excessive black/white smoke.
Increased fuel consumption.
Fault codes (e.g., Cummins fault codes 221, 235, or 238 for injector circuit issues).
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