original 238-8091 Engine Fuel Injector 2388091 10R-4761 387-9427 263-8216 268-9577 328-2586 for C7 C9  original new injector

Engineered specifically for the C7 diesel engine platform, the 238-8091 HEUI fuel injector assembly is a direct OE-style replacement designed to restore factory performance in heavy-duty operating conditions. The unit integrates precisely with C7 engine architecture, supporting correct fuel metering, correct injection timing, and correct atomization to deliver balanced cylinder combustion across the full engine speed range. For related references listed against 3126B or C9 applications, final confirmation by engine serial number is required before installation. The 238-8091 injector is commonly serviced as a complete set of six units per engine in high-hour rebuild scenarios.
The 238-8091 assembly is widely cross-referenced across the diesel aftermarket under 2388091, 10R-4763, 10R4763, 20R-8059, 20R8059, 233-3535, 236-0974, 2360974, 241-3400, 2413400, 263-8218, 2638218, 295-1410, 2951410, 328-2582, 3282582, 387-9428, 3879428, 2225958, 2225962, 2313400, 2462343, EX634763, PAI 390093X, Interstate-McBee M-2388091, DIPACO D2388091, and Alliant Power AP63687. Equipment coverage includes 140K2, 324D, 324D FM, 324D FM LL, 324D L, 324D LN, 325D, 325D FM, 325D FM LL, 325D L, 325D MH, 326D L, 328D LCR, 329D, 329D L, 329D LN, M325D L MH, and M325D MH, serving professional diesel repair, heavy equipment maintenance, fleet workshops, engine rebuilders, diesel parts distributors, mining and construction maintenance, agricultural equipment service, and global aftermarket replacement programs.
The 238-8091 C7 fuel injector addresses common field symptoms including hard starting, rough idle, black smoke, white smoke, power loss, misfire, high fuel consumption, fuel dilution in oil, knocking noise, and repeated injector failure. Root causes typically involve injector leakage, poor atomization, internal wear, failed coil, bad wiring, contaminated fuel, incorrect oil quality, or poor sealing. Recommended diagnostic actions include diagnostic scanning, cylinder balance testing, leakage testing, harness inspection, and fuel system cleaning before replacement. Proper maintenance—clean diesel fuel, scheduled fuel filter replacement, water separator draining, correct engine oil quality, and clean injector harness connectors—helps the 238-8091 assembly deliver reduced white and black smoke, reduced rough idle and power loss, better cold starting, and stable engine performance under load throughout its service life.