Lpi Vialle Technical Manual Top Fix | iOS |

Locate the primary injector emulator harness and clean the multi-pin connector using dedicated contact cleaner. Verify that ground paths read under 0.5 Ohms back to the negative battery terminal. Software Configuration Guide Lpi Vialle Technical Manual

Disconnect the electrical harness connector from the target injector. Configure a digital multimeter to measure resistance ( Ωcap omega ) across the lowest scale.

Early generation Vialle pumps utilize a sealed oil reservoir inside the pump core to lubricate the internal bearing races and gear sets. If this oil leaks out or becomes contaminated with liquid propane due to failing internal dynamic seals, the pump will rapidly overheat and seize.

Older generations of Vialle pumps (V10/V25) utilize a dedicated oil reservoir to lubricate the internal bearings. If this oil leaks or degrades, the pump will seize.

Unlike vapor systems that use a venturi or other throttles in the inlet system, liquid injection maintains the intake's airflow, resulting in no loss of engine power. lpi vialle technical manual top

If you are installing or maintaining a Vialle LPi system, this manual is non-negotiable. However, it should be used in conjunction with formal training on high-pressure LPG systems. Do not attempt to interpret the hydraulic schematics without a firm understanding of fuel system dynamics.

The LPE-7 is the technological core of the LPi system. It is an intelligent slave computer that intercepts the injector signals from your car's original Engine Control Unit (ECU). Instead of using its own fuel map, it translates the petrol injector's timing signal into a precise command for the LPG injector. This approach gives LPi its significant advantages by avoiding performance losses from air displacement, which can be up to 7% in vapor systems, and ensuring the original engine management's self-learning capabilities are fully retained for optimal fueling under all conditions.

Switch the system to LPG mode to turn the pump on. The pressure reading must immediately rise by 3.0 to 5.0 bar above the static tank pressure baseline . If the pressure increases by less than 2.0 bar, the pump cannot keep the propane in a pure liquid state inside the hot engine bay. This shortfall will cause vapor locks and intermittent stalling. Step 2: Injector Resistance Verification

When a system fails to switch to gas, experiences a drop in performance, or triggers a check engine light, mechanics should reference the structured troubleshooting protocols found in the Vialle LPG System Help Guide : 1. Pressure Loss & Low-Pressure Petrol Cutback Locate the primary injector emulator harness and clean

The revolutionized the autogas industry by injecting LPG into an engine in its liquid phase rather than vapor form , ensuring zero power loss and maximum combustion efficiency . Unlike old evaporator systems, the Vialle system relies on an internal high-pressure tank pump and a dedicated Liquid Product Injection Electronics (LPE) unit to maintain control over fuel metering.

The manual often includes a diagnostic table. Common issues addressed:

The system has detected a safety-critical fault (e.g., severe pressure loss or injector short circuit) and has locked out LPG operation.

Unlike traditional evaporator/venturi systems that use gaseous LPG, the LPi system injects liquid LPG . This prevents power loss and makes the system less sensitive to ambient temperatures. Configure a digital multimeter to measure resistance (

: No loss of engine power because the "cooling effect" of liquid-to-gas phase change densifies the intake air, often improving efficiency. Environmental Impact

[ LPG Tank + PTC Pump ] --------(High-Pressure Feed)--------> [ Fuel Rail & Injectors ] ^ | |-----------------------(Return Line via Regulator)-------------|

The engine always starts on gasoline. The LPE runs a purge cycle to flush any vaporized gas out of the fuel rail and replace it with pressurized liquid.

Once the purge cycle completes and engine parameters (like coolant temperature) are met, the LPE seamlessly shuts off the gasoline injectors and activates the LPG injectors.