Sorted ... well maybe ! Changed the fuel filters today ( one was well stuck) repeatedly primed the system and convinced myself that the skoosh sound I had been hearing at the filter , and slightly at the fuel rail, had virtually gone. Tried to start it but of course it wouldn't. Next thing was back seats out to check the pipework at the fuel pump, again seemed fine.
I did some software updates on my scanner last night so had another go at getting some detailed live data, but no joy. Only thing I noticed was that rpm took a few seconds to display. Thinking I might well have to do the crank sensor (transaxle out etc !!) and clutching at straws I wondered if the camshaft sensor had any bearing on that so I disconnected it to see if it changed any data.
WOW I could hardly believe it when it started straight away ! Tried it a few times, connected/disconnected and would start but only disconnected. I switched the sensor back to the original but again would only run disconnected.
Now when I first ordered the camshaft sensor, via a major ebay supplier, despite giving my reg number,the wrong one arrived, wrong shape and too long. I got back onto them with VIN this time and was told they didn't have one listed. Back onto ebay and found a few that looked the part including one from the same seller. How many different camshaft sensors can there be for a particular engine I thought ? One with and without start stop perhaps ? So back on the phone and was told that it might well be right but neither it or any sensor was showing for my VIN. I agreed I'd take it without guarantee.
I am now hoping this was my mistake and that going direct to Vauxhall will see me sorted ,,, if not theres something seriously wierd going on in my ECU, Thanks for previous comments, I'll update when I get a chance to go and get one.
Last edited by Gyislander; 5th March 2020 at 18:24.