mk2 zs180, turn over but no spark
 

changed cam and crank sensors, still no spark.
changed ring to pickup code from fob also.
engine speed is being read on diags, so its seeing the crank sensor.

led in middle of dash flashes when armed, goes off when unlocked via fob and stays off when ignition is on, engine turns over but does not spark.

almost like its in a state of immobilisation.

mk2 with pektron and round 3 button fobs, both fobs will lock/unlock car.

any ideas?

Engine earth?

Is it showing any fault codes?

Maybe try running a spare jump lead between the engine and body, if it fires up then engine earth it is

no fault codes.

would it turn over with a bad earth?

Does the fuel cut-off have the same effect?
Are you getting the sound of the fuel pump when the ignition is on?

fuel cut flashes the indicators like mad when its tripped - not that, tried pressing it anyway just iing indicators.ncase, but its not flash

fuel pump primes on ignition.

should the little led in the dash be off when mobilised?

I'm pretty sure the led should be off.

Did you say you'd changed the transponder ring round the ignition barrel

yep. changed ring.