Hiya i have an annoying problem. My Vectra cuts out after 5-6 mins tops as if its run out of petrol. Its not the petrol pump or the relay as both have been changed and made no difference. Have had breakdown out but they were found no error codes. The ECU light isnt on. After it dies out it takes a while to restart. Before it dies out when starting i can hear the petrol pump. After its died out i cant hear ir priming when i try starting. . Not long ago it had a service so all filters etc have been changed. The car doesnt sound rough sounds perfect even when revved high so no pinking etc.. Just wondered where my friend can look now i have been told about sensors but wondered if this was the case how can they be tested to see?. much appreciated for any info.

Thanx.