Injection Systems
GEMS support.
Support for Sagem/Lucas Generic Engine Management System (GEMS) sequential injection setups on Rover V8 applications.
GEMS Profile
Sequential injection with OBDII-era diagnostics.
- Used on 1995-early 1999 Range Rover, 1996-early 1999 Discovery and 1997 Defender applications
- Short-term and long-term fuelling offset behaviour support
- Integrated ignition timing strategy diagnosis support
- OBDII compliant diagnostics and non-volatile memory behaviour checks
GEMS is often best approached as a complete fueling and ignition strategy check, rather than a single component swap.
Input and Output Differences
Typical points we validate.
Oxygen sensing
Pre and post catalyst oxygen sensor behavior is checked to separate mixture faults from catalyst efficiency reporting.
Idle and throttle response
Stepper-based idle control and TPS adaptation trends are reviewed against real running behavior.
Temperature strategy
ECT, EFT and intake air temperature effects are checked together to catch false fueling corrections.
If you have a GEMS vehicle with hot start, idle or transition faults, we can help you structure a clean diagnostic route.
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