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Because it doesn't use venturis or throttles, there's zero loss of performance compared to petrol. 🧩 Key System Components
The LPI Vialle technical manual highlights several advantages of the system:
Read the static tank pressure with the system off (e.g., 6 bar). Jump the pump relay to activate the PTS pump manually.
While official Vialle documentation is primarily distributed through authorised partners and installers, several resources are available to the public: lpi+vialle+technical+manual
Insufficient fuel delivery caused by a failing pressure regulator, low pump pressure, or clogged internal injector filters.
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Vialle’s system bypassed this entirely. The technical manual outlines a system where liquid LPG is injected directly into the intake ports, just millimeters from the intake valves. Because liquid is dense, it displaces almost no air. Furthermore, as the liquid gas evaporates inside the cylinder, it absorbs heat, cooling the intake air and increasing density—a phenomenon that often allowed LPI engines to produce more power than they did on petrol. Because it doesn't use venturis or throttles, there's
The LPI+Vialle system is not a "fit and forget" conversion. Its liquid-phase delivery offers unmatched performance and intake cooling, but it demands rigorous attention to fuel temperature compensation, cavitation avoidance, and injector dead-time calibration. Technicians must treat it as a high-pressure fuel system (similar to direct petrol injection), yet with the behavioral anomalies of a cryogenic fluid.
Correct orientation and angle in the intake manifold to ensure optimal combustion. B. Calibration and Tuning
: Liquefied Petroleum Injection systems are designed to offer a more environmentally friendly alternative to traditional fuel systems. They use propane, which burns cleaner and can be more efficient. The technical manual outlines a system where liquid
Direct management by the engine control unit (ECU) ensures precise emission control and smooth drivability. 2. Core Components Documented in the Technical Manual
The technical manual provides a comprehensive troubleshooting guide, allowing technicians to pinpoint issues efficiently using diagnostic software.
while running on LPG, the wrong LPE map version is installed, or the injector nozzles are the wrong physical size (denoted by color codes).
Check the electrical voltage at the pressure sensor and inspect regulator sealing. Hydraulic Pressure Testing