T8MA Injector Problems – Symptoms, Causes & Fixes

Engine: T8MA 14 compatible injectors From £90

Common Injector Failures on the T8MA

The T8MA 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 14 tested replacement injectors for this engine from Bosch, Delphi, Siemens.

Vehicles fitted with the T8MA 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 T8MA 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

T8MA Injector Replacement Cost

Parts (per injector)

£90–£162

Labour

£150–£400

Total (per injector)

£240–£562

Full replacement cost guide

Compatible Injectors for the T8MA14 found

Most Common Injector Part Numbers for T8MA Engine

Related Cross Reference Numbers for T8MA

0445110136 0445110188 0445115025 0445115092 0986435090 0986435351 0986435450 1980H3

Vehicles Using the T8MA Engine

Ford TRANSIT CONNECTT8MA

Ford S-MAXT8MA

Related Engine Codes

4HK 4HN 4HP 4HR 4HS 4HT

Frequently Asked Questions

What are common injector problems on the T8MA engine?

The T8MA 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 T8MA engine?

A remanufactured injector for the T8MA engine typically costs £90–£162 per injector. Labour adds £150–£400 depending on accessibility. We found 14 compatible injectors for this engine.

Which vehicles use the T8MA engine?

The T8MA engine is found in vehicles from Ford. Common models include Ford FOCUS, Ford FUSION, Ford GALAXY, Ford KA, Ford MONDEO.

How do I test the injectors on a T8MA 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 T8MA Injector?

We stock 14 tested replacement injectors for the T8MA engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All Injectors Replacement Cost Guide Call 020 3355 6581