28231014 — Technical Research
Delphi solenoid common-rail injector for the Great Wall / Haval 2.0-litre 4D20 diesel (Euro 4/5) fitted to the Great Wall Steed (Wingle 5), Hover H5 and Haval H6. Great Wall OE 1100100-ED01. A trim/IMA code is written to the ECU on fitment. The 4D20 is sensitive to fuel filtration; failures are driven by contamination and back-leakage wear. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
Delphi 28231014 2.0 Diesel (4D20) Common Rail Injector (Great Wall Steed / Hover H5 / Haval H6)
Delphi solenoid common-rail injector for the Great Wall / Haval 2.0-litre 4D20 diesel (Euro 4/5) fitted to the Great Wall Steed (Wingle 5), Hover H5 and Haval H6. Great Wall OE 1100100-ED01. A trim/IMA code is written to the ECU on fitment. The 4D20 is sensitive to fuel filtration; failures are driven by contamination and back-leakage wear. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
A leaking injector unbalances cylinder fuelling on the 4D20.
Excess back-leakage drops cranking rail pressure.
Out-of-range delivery or rail-pressure deviation cuts power.
Poor atomisation over-fuels the cylinder.
Cylinder-specific injector or fuel-metering codes.
- InstallationWrite the injector trim/IMA code to the correct cylinder with the dealer diagnostic tool before road test.
- InstallationRenew the combustion seal and clamp hardware; torque to spec.
- MisdiagnosisRead live back-leakage data to find the weak cylinder before removal.
- WarningConfirm the OE number 1100100-ED01 stamped on the old injector; the 4D20 is sensitive to fuel quality - fix contamination first.
- TestingBench-test on a Delphi-capable CR tester across delivery and back-leakage points before refit.
What is Delphi injector 28231014?+
A Delphi solenoid common-rail diesel injector for the Great Wall / Haval 2.0 4D20 engine. Great Wall OE 1100100-ED01.
Which vehicles use 28231014?+
Great Wall Steed (Wingle 5), Hover H5 and Haval H6 with the 2.0 4D20 diesel, roughly 2010-2018.
Is it solenoid or piezo?+
It is a Delphi solenoid common-rail injector.
Does 28231014 need coding?+
Yes - write the injector trim/IMA code to the correct cylinder with the dealer diagnostic tool when fitting.
What is the OE part number?+
Great Wall 1100100-ED01 references Delphi 28231014.
Does it fit the Great Wall Steed sold in the UK?+
Yes - the UK-market Great Wall Steed 2.0 TD uses the 4D20 engine; confirm the OE number stamped on your injector.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my 4D20 run rough?+
A worn or leaking injector unbalances fuelling; read live back-leakage data and bench-test the weak cylinder.
What causes these injectors to fail?+
Poor fuel filtration, contamination and back-leakage wear - fix the cause first.
Does a remanufactured 28231014 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Delphi plan, then coded on fitment.