Vialle LPi injectors cannot be cleaned using standard petrol ultrasonic methods, as the internal seals can degrade. Use specialized LPG-safe solvent flushes.

Clean or replace faulty liquid injector; check purge valve operation. Worn tank pump bearings; Restricted fuel filter.

A 2006 Chevrolet Tahoe with a Vialle LPI system runs perfectly on gasoline but sputters under hard acceleration on LPG. The LPG pressure gauge drops from 8 bar to 2 bar during throttle tip-in.

: Use standard gas leak detection methods for pressurized LPG while observing safety precautions. Diagnostics : Service centers use a diagnostic interface

Comprehensive Diagnostic Flowchart: Engine Stalls on LPG Switchover

Power drops typical of vapor LPG systems are eliminated.

: Check for water damage at electrical connectors or crush damage to the cable/pipe loom running from the tank to the coupling block. Fuel Gauge Issues

The vehicle cranks extensively or fails to start after being parked warm for 15–30 minutes.

: This assembly includes a pressure transmitter to monitor the fuel system's status. Fuel Selector Switch