Lpgc wrote:
You can't force start most BRC gas systems on gas.
I don't think the potential for a leaking LPG injector or reducer has been mentioned? Run on gas and the gas system gets pressurised, turn the engine off and gas leaks into the manifold, try to start the engine and the engine gets petrol and gas instead of petrol and air until there's been enough cranking to pump the gas out of the manifold but by which point the plugs might then be wet with petrol.
At least worth ruling this out by driving on petrol for an hour before turning the engine off so if there is such leak gas will have been used with the engine running rather than displace air in the plenum?
Others will know better than me but iIrc the pump doesn't work on these until cranking, either that or it runs for a couple of seconds in pos2 then stops until cranking. 17 Seconds after stalling is probably about right?
A lot of engines give a really long 1 or 2 petrol injector pulses immediately on turning to the cranking position before reverting to normal pulse lengths for cranking which may be temperature dependent.
Thanks for the input Simon - I tried running on petrol for a day but no change in the morning. I guess we can eliminate LPG from my enquiries!