Adhering to the technical manual is crucial for legal compliance.
Diagnosing a Vialle LPi system requires understanding both hydraulic pressure and electronic signals. Probable Cause Diagnostic Action Gas bubbles in the rail / Leaking injector
Understanding the wiring schematic is critical for diagnostic routing. The Vialle LPi system relies heavily on the vehicle's original sensors, modifying only the injection outputs.
The tank must be mounted securely, and injector placement should be close to the intake valves.
For diagnostics, Vialle provides USB interfaces for Windows, Linux, and Mac systems, enabling professionals to connect to the LPi ECU for detailed system analysis and calibration. lpi+vialle+technical+manual
If your live data deviates by >20% from these manual values, the manual instructs you to perform a (disconnect return line and run pump at 10 bar).
Perform a leak-down test on the fuel rail after engine shutoff to isolate weeping injectors. Blown system fuse or internal pump motor failure.
: Mounted in the engine compartment, this unit regulates system loop pressure and houses an electronic shut-off solenoid valve. It maintains stable fuel pressure at the injectors regardless of engine load.
Reprinted verbatim from the safety section of the Vialle LPI technical manual (edition 2013): Adhering to the technical manual is crucial for
Check flush phase duration; leak-test injectors using soapy water on the nozzles. Failing PTS Pump / Clogged filter
The core innovation of the Vialle LPi system is that it does not convert the LPG into vapor before injection. Instead, it maintains the propane in a liquid state, which increases the density of the fuel, improves volumetric efficiency, and results in improved power output and torque, closely matching petrol performance.
To ensure your system runs smoothly, always keep your diagnostic software updated and check your fuel pressure regularly.
Insufficient fuel delivery caused by a failing pressure regulator, low pump pressure, or clogged internal injector filters. The Vialle LPi system relies heavily on the
The system utilizes a continuous loop. Liquid LPG flows from the tank to the fuel rail, and excess fuel returns to the tank.
One of the system’s most elegant features is that it requires only the petrol injection times to regulate the LPi system. Pump speed, gas injection pressure, and injection timing are all calculated from the petrol injection signals, maintaining all original OBD diagnostic functions. The factory programming for each specific vehicle means extensive calibration after conversion is unnecessary.
Problems are organized by symptoms (e.g., rough idling, failure to switch to gas) or specific error codes.
Maintenance of the LPi system is generally lower than traditional LPG systems, but specialized knowledge is required for repairs.