Posted by Jhonno on February 16, 2008, 11:55 am, in reply to "Re: lpg problem"
121.217.30.91

--Previous Message-- : : : --Previous Message-- : Thinking on this a bit more . : : I do think it is an electrical problem : . : : All i`m doing by putting power on the : solenoid is opening the gas flow from : the tanks to the convertor . : : If the gas was there at the convertor : it should start straight away , which : it does not . : : So the time lapse , winding over is for : the gas coming from the tank or line to : the converter . : : What do you think ? : : When it happens again i should be able : to prove it by undoing the filter and : if there`s no gas , i`ll have to go : looking but i`d need to have a leak : between the converter and the mixers : and although there is sometimes a : slight smell of gas , never strong . : : Or possibly the tank solenoid is : shutting off for some reason ? : : With the 2 tanks there is only 1 main : line to the converter but both tanks : join at a valve ( that i can`t think of : the name of ? ) : Could be that this valve is at fault , : it is not solenoid controlled but : mechanical . : : Trouble is it has normally happened at : a time not suited to investigation . : : Cheers : : : : --Previous Message-- : Hi all : : 85 BA duel fuel IMPCO system Twin carb : Twin Mixers Twin tanks . : : This is not from cold , it has to be : primed to start from cold , the problem : occurs when it is warmed and also often : when air temp is higher , it`s : intermittant and ongoing for a couple : of years . : : Every now and again but not of late and : even in the heat , the car won`t start : on LPG . : : It generally fires once and won`t start : when it occurs . Similar to when a : rotor is playing up . : : Other times it will it will run for : 5/10 sec and stop and not restart . : : Then other times it`s dead as a door : nail , winds but won`t start . : : It`s only ever happened twice after : refueling . : : The norm is the key is barely turned : and it fires , just sort of flicked on : and it fires , there is nothing wrong : with the start system . : : I can find no faults with the lpg : system or electrics related other than : the way i can start it when the problem : occurs . : : The way it can be started is by : disconecting the solenoid wires and : jumping a power wire to the main fuel : line solenoid at the converter . : : If i do this it will wind over for : around 5 seconds before it will start : but it will always start . : : If i don`t do this it can be wound over : for as long as you feel like , it can : be left and gone back to for 10/15/30 : minutes and it may or may not start . : : The way this part of it works is : similar to an EFI fuel pump , there is : a computer , it`s not the normal type : saftey switch ( well it`s called a : computer don`t know what`s in it )under : the dash so what i`m doing is like : jumping a power wire to an EFI fuel : pump . : : Sorry about the length but it`s a bit : hard to explain otherwise . : : Any ideas ? : : Cheers , Peter : : : : : G'day Peter, just been through this : very same problem with my 87 classic, : turned out to be a faulty rotor button, : hope this is of help. Jhonno : Peter I've just reread your original post, maybe the little computer thing you are talking about is the timer??? I had one of these play up on my previous RR (85) not efi, caused me all sorts of grief. Regards Jhonno