CD390 Injector Problems – Symptoms, Causes & Fixes

Engine: CD390 1 compatible injectors From £120

Common Injector Failures on the CD390

The CD390 engine uses high-pressure common rail diesel injection. Over time, injector nozzles wear, seals degrade, and internal components lose calibration. This leads to a range of drivability symptoms that worsen if left unaddressed. We stock 1 tested replacement injectors for this engine from Delphi.

Vehicles fitted with the CD390 include models from Ford. If you are experiencing any of the symptoms below, your injectors may need testing or replacement.

Symptoms of Injector Failure

Related Fault Codes

P0201 P0202 P0203 P0204 P0263 P0266 P0269 P0087 P0089 P0300

How to Test CD390 Injectors

Leak-off test: Connect clear hoses to the injector return lines and compare fuel volumes at idle. The injector returning the most fuel is likely worn.

Correction values: Use a scan tool to read injector correction (IMA) values. Readings beyond ±3 mg/stroke indicate wear.

Resistance check: Measure resistance across the injector connector pins with a multimeter. Compare to manufacturer specs.

Complete Testing Guide Leak-Off Test Guide

CD390 Injector Replacement Cost

Parts (per injector)

£120–£120

Labour

£150–£400

Total (per injector)

£270–£520

Full replacement cost guide

Compatible Injectors for the CD3901 found

4902297464Delphi

£120.00

Most Common Injector Part Numbers for CD390 Engine

4902297464Delphi

£120.0014 vehicles

Vehicles Using the CD390 Engine

Ford GALAXYCD390

Related Engine Codes

CVRA CYFA DRRA G6DG G8DA G8DB

Frequently Asked Questions

What are common injector problems on the CD390 engine?

The CD390 engine commonly suffers from injector seal failure, nozzle wear causing poor spray patterns, and back-leak issues. Symptoms include rough idle, black or white exhaust smoke, hard starting, and increased fuel consumption. These issues typically appear after 100,000–150,000 miles.

How much does it cost to replace injectors on a CD390 engine?

A remanufactured injector for the CD390 engine typically costs £120–£120 per injector. Labour adds £150–£400 depending on accessibility. We found 1 compatible injectors for this engine.

Which vehicles use the CD390 engine?

The CD390 engine is found in vehicles from Ford. Common models include Ford GALAXY.

How do I test the injectors on a CD390 engine?

Perform a leak-off test by connecting clear hoses to each injector return line and comparing fuel volumes at idle. You can also check injector correction values with a diagnostic scan tool or measure electrical resistance with a multimeter.

Injector Compatibility Checker

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Need a Replacement CD390 Injector?

We stock 1 tested replacement injectors for the CD390 engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All Injectors Replacement Cost Guide Call 020 3355 6581