Over the past week noticed slight intermittent misfire especially under load and twice switching back to petrol.
Quick check over and nothing untoward found on any of the usual culprits.
Plugged in diagnostics, found petrol injectors firing at the same time as running LPG, also managed to capture a change over to petrol at 120s, this while steadily increasing revs, at about 1400rpm
Scope capture below, traces from top to bottom:
Petrol Injector 1
Petrol Injector 2
Petrol Injector 3
Petrol Injector 4
ANY suggestions, no matter how obscure, welcomed.