Hi all am workin on a 1990 v8 disco for my mate I was driveing it along and it just cut out and won't start its gettin fuel and a spark a week one tho I've changed the coil and managed to start for couple mins but here's the weird bit only on drivers side bank of clyinders and now it won't even fire at all its a 3.5 efi one of early ones was running great b4 anybody got idears ?