HI can someone please help i have a RR classic 1988 with lpg conversion i have completly re built bottom half of engine piston rings mains big ends after i did it my rangy started and sounded lovely run it for a week,left it for a day then went to start it cos mot was due following day wouldn't start had someone out said spark from coil was jumpin so changed still no joy had someone else out he said spark plugs were shot so he changed them sound i thought it's fireing(which it wasn't before)but after 3hrs it still wouldn't start so he went after a further 5mins i got it started somehow the fuel cut off relay had been clipped onto wrong side of coil great i thought had it running for about 30mins then it just stopped and will not start.anyone have any ideas cos it's doing my head in.....

oh i have changed the air flow meter and ecu but still no joy it tries to start but just wont

oh i have changed the air flow meter and ecu but still no joy it tries to start but just wont[/quote].

Ello njh here.

Have you tried checking the resistor pack? (Which the first company that did my gas conversion on my 2nd classic conveniently moved to where the road water could really fill it up.)
I would also just double check the fuel delivery.

P.s on my gas con there is an emergency gas start option by holding down the changeover switch.
cheers njh.

Its back to basics for you disconect fuel hose and make sure you have pressure (working fuel pump) it sounds like it may be that also look at the air intake to see if any vacum hoses or gas system are letting in any air, a sucking noise normally gives this away.My lpg system had a poorly fitting blowback release coller and ran very poorly untill i re fitted it.

Bobmar said:

Its back to basics for you disconect fuel hose and make sure you have pressure (working fuel pump) it sounds like it may be that also look at the air intake to see if any vacum hoses or gas system are letting in any air, a sucking noise normally gives this away.My lpg system had a poorly fitting blowback release coller and ran very poorly untill i re fitted it.

Click to expand...

HI THANKS FOR THE REPLY IF I TAKE THE FUEL HOSE OFF AND TURN IT OVER HOW SHOULD THE PETROL COME OUT COS WHEN I DID IT IT DIDN'T COME OUT VERY FAST

It should come out under a fair amout of pressure