The other day when I went to move the motorhome it really struggled to start, like 3 turns of the key before it started. ( plenty of power 13.4v on all 3 batteries,) more like a fuel problem. After I had moved it and tried to restart, there was nothing at all!! All lights etc were on fine battery was good. I maybe thought the immobiliser wasnt working at first so got spare set and tried that still wouldnt start. After a quick Google search every thing pointed to an earth problem, mainly the engine earth strap to the chassis. So I got the jump lead and bypassed the strap, put the jump lead from chassis point onto the engine and hey presto it started right away. So I replaced the earth strap with the propper gauge new one. Went to start it and Nothing! I then proceeded and then got another earth strap and from where the earth strap point on the engine mount is I put an extra earth strap to the engine at the nearest position and yes, the engine started right away(better than it ever as). So this got me thinking why isn't the engine getting an earth where the original earth strap that connects from the chassis to the engine mount/gearbox ? Is there something more sinister to this than I'm missing here? Any advice greatly accepted. Thanks.