Just a newbie here .... to this thread and confess haven't read thoroughly so may have missed something that's been said along the way.
Smell petrol on removing a plug? Tacho flicking on cranking?
Have you tried immediately putting your foot to the floor on the accelerator pedal as soon as it doesn't start, i.e. after 2/3 seconds? If not do so and, hold accelerator to the floor while continue cranking without stopping until hopefully it fires up! You might flatten the battery if it's not up to the mark!! Assuming it's LH2.4 the first xxx 590 ecu's had a problem.
Bob
