FHZ Injector Problems – Symptoms, Causes & Fixes

Engine: FHZ 1 compatible injectors From £100

Common Injector Failures on the FHZ

The FHZ 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 Bosch.

Vehicles fitted with the FHZ include models from Alfa Romeo, Citroen, Fiat, 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 FHZ 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

FHZ Injector Replacement Cost

Parts (per injector)

£100–£100

Labour

£150–£400

Total (per injector)

£250–£500

Full replacement cost guide

Compatible Injectors for the FHZ1 found

0445110351Bosch

£100.00

Related Cross Reference Numbers for FHZ

0986435204 1723813 1980EQ

Related Engine Codes

A13FD D13AA

Frequently Asked Questions

What are common injector problems on the FHZ engine?

The FHZ 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 FHZ engine?

A remanufactured injector for the FHZ engine typically costs £100–£100 per injector. Labour adds £150–£400 depending on accessibility. We found 1 compatible injectors for this engine.

Which vehicles use the FHZ engine?

The FHZ engine is found in vehicles from Alfa Romeo, Citroen, Fiat, Ford. Common models include Alfa Romeo Mito, Citroen Nemo, Fiat 500, Fiat Doblo, Fiat Fiorino.

How do I test the injectors on a FHZ 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 FHZ Injector?

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

View All Injectors Replacement Cost Guide Call 020 3355 6581