P0304 Fault in 1.6L Mitsubishi Lancer with LPG System - How to Diagnose and Fix?

Model: Mitsubishi Lancer Fault Code: P0304 Posted: 2019-01-08 11:19

Hello everyone. My Mitsubishi Lancer 1.6L with an LPG kit is showing fault code P0304. I've already replaced the spark plugs and swapped the coil packs, but the engine still intermittently misfires, especially in the fourth cylinder. The diagnostic tool indicates a 'misfire on cylinder 4' issue. I'm currently suspecting damage to the intake manifold, particularly since the LPG system was installed. Could the installation have caused cracks or leaks in the intake manifold? Any advice on how to properly diagnose and resolve this P0304 error with an LPG setup would be greatly appreciated.