I've followed good advice and tested it with EScan - and all is fine.
It seems I might be suffering 'tractor-running' due to a different problem, initially thought to be vacuum hose but now identified as a possible f/injector fault since reading the LEC post of a pal who had the same cyls 1+3 breakdown with healthy sparks whilst tripping in France.
He took one of the offending f/inj caps off and motored home on 3 cyls - and mine fired up on 3 in the same way. They're wired in pairs and apparently if one fails it switches the other off...
But try getting a set of f/injs in UK.
And yes initially I made the error of buying Ultra-flow MSI31 injectors from the RAuto incorrectly labelled (over years I subsequently found...) catalogue. They're suitable for n/a m100s but incorrectly recommended for turbo ISUZU (but, curiously, not AWD - the ISUZU variant that has our turbo engine
)Anyway, I've just got a good used set (Delphi, 2ohms impedance and flow rate of 325cc @ 3bar) thanks to Steve in Essex, so I'll be able to report back with good news soon I hope
