Every MGF and MG TF uses multi-point sequential electronic fuel injection controlled by the Rover MEMS ECU, there are no carburettors on any variant. Each cylinder has its own injector mounted in the inlet manifold port, fired individually in the engine's firing sequence to spray fuel onto the back of the intake valve as it opens. This sequential approach provides more precise fuel metering than batch-fire systems used in earlier fuel injection applications and contributes to the K-series' good fuel economy and clean emissions characteristics. Injector flow rates vary across the engine range, the VVC engines (MGF VVC, Trophy 160, TF 160) have higher-flow injectors than the standard 1.8 or 1.6 applications, matched to the higher power output.
Injectors must match the engine variant and its MEMS calibration; fitting injectors intended for a different engine variant will produce incorrect fuelling and poor running.
Two Catalogue Paths
This section splits into two child pages. Fuel Injection & Throttle Body covers the standard fuel injection system, fuel injectors and their seals, the fuel rail, the throttle body, the idle air control valve (IACV), the throttle position sensor, and the fuel pressure regulator. These are the items customers need for routine service, fault diagnosis, and component replacement. Upgrades & Alternatives covers performance and alternative fuel injection components, higher-flow injector options for modified engines, uprated throttle bodies for increased airflow, and other aftermarket solutions that sit alongside or replace the standard components.
Before ordering, confirm engine variant (1.6 Non-VVC, 1.8 Non-VVC, or 1.8 VVC) and MEMS version (MEMS 1.9 on early non-VVC, MEMS 2J on early VVC, MEMS 3 from MY2000 on most variants), fuel injection components are calibration-sensitive and must match the ECU expecting them.
Diagnostic Context
The MGF and MG TF's electronic fuel injection is a significant departure from the carburettor systems on earlier MGs, and diagnostic approach matches the modern character of the system. Running problems on the MGF and TF, misfires, rough idle, poor cold starting, fault codes, are most efficiently diagnosed with an OBD-II or proprietary Rover diagnostic tool that can read MEMS fault codes and live sensor data, rather than the manual investigation approach appropriate to a carburettor car. Many routine MGF/TF running problems resolve on a simple component-by-component check (spark plugs, coil pack, air filter, fuel filter, IACV cleaning), but persistent running issues warrant a proper diagnostic scan before replacing parts by trial and error.