Quote Originally Posted by Bidja View Post
Thanks mate for your comments. Have run the Navara ute (petrol injector fuelling) for now over 10 yrs on dual fuel mainly LPG and always cold start on petrol. I live 620m above sea level on the southern tablelands, NSW and at this time of the yr the overnight temp is warming up to between 5-12 deg C but in winter we have frosts nearly every morning and gets down over night to below zero nightly, down to minus 5 degC and on occasion to say minus 9 degC. So yeh the converter needs a bit of warm water around it. Do understand that valve recession is probably the main downfall running LPG (stellite valve faces and seats or similar are of benefit). All the best on sorting it out.
Yeah, many of the LPG conversions done on EFI engine within last ten to fifteen years were programmed with an auto switch to start always with petrol and automatically switch to LPG after few minutes, AFAIK.
No argument, "wash effect" wear or not, starting on petrol makes sense in cold climates as the converter freezes up easily with LPG when too cold. For warmer climates, I reckon starting on LPG is a good idea.