do not i repeat do not use your car with the engine managment light flashing it is telling you that you are damaging your catalytic converter.

if the light is constantly on it is telling you a fault exists which will affect emmisions and needs diagnosing/rectifing

if the lamp flashes it usally means a significant ignition related misfire exists and is dumping raw petrol onto the cat monolith causing it to overheat and melt and then block the exhaust.

low compression wont cause a random misfire and make it intermittant likewise an inlet manifold leak

the fault is ignition related pure and simple.

you need to find out what cylinders are misfiring if its the inner 2 or outer 2 look at the coil that supplys these cyinders but before you replace the coil check the live and pulsed neg to it to make sure its not wiring or and ecu not suppling the pulsed neg (unlikely)

a fueling fault wont make the managment lamp flash

.. wo Original Ersatzteile eines Autohersteller herkommen, der schon seid über 10 Jahren pleite ist.

Zündkerzen sind bei allen gleich (NLP100290), gibt’s z.B. beim Stiegler (Britischcarfan hier im Forum mit Rabatt).

Kat ist beim Trophy der vom Mk2.