Hi can anyone help, we have this astra and intermittently it won't start, it cranks over but there is no spark , no fuel pump or injection its been in the dealers and had the immobiliser reprogrammed but is still no different,
It seems as though the ecu is just not being powered up, when you try and start it all the dash lights are on engine management etc and it cranks no problem but just wont start, then you can try again and the engine management light flickers once and it will then fire up and run.
When it is running it is no problem runs sweet no cutting out or anything.
Please help its driving us mad.