Posted by tim_m on February 10, 2008, 8:08 am, in reply to "lpg problem"
124.168.235.219

Peter Suggest looking at the electrical connections on the lpg. ie Both the +12 volt and the earth connections which often corrode enought to cause problems. I prefer to use a small light globe with a couple of wires soldered to it. Connect one end to a good earth to check the +12 volt items with the other. Payes to have a sharp tip to connect to probe with. Corner of a screw driver or sharpened nail. Can be worth taping up the metal object. Any tape will do. Earthy connections are checked by connecting one end to +12 volts and the probe on ground will be bright for a good earth. Find one has 3 states. OFF ie no light 12 volts ie bright light in between ie usually one is powering up something through the globe. By the way Had a similar frustation on a single mixer set up. Turned out to be the economising valve which was between the evaporator and the mixer. This had a stripped thread. Is there such an item on yours. Cheers Tim_m --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 : :