Hi John,
Thanks for the reply ! I thought I hadn't posted this correctly or no one was talking to me. Sprk plugs were changed early on and quality plugs too. Ran like a dream for months.
As for cars throwing you of the scent. I'm beginning to wonder it it's the readers so many on the market, I've had differrent devices plugged in, all point to fuel pressure.
I'm thinking it's so intermittent if it was electrical surely it would be a continious deteriating condition like overheating etc. I'm starting to think what if there was a kink or something in a fuel line or some sort of !Removed! floating around in the fuel system and every now and then turns up in the right place and causes a low pressure now and then. Stinks of ecu to me back to electrical ecu can cause intermittent fault without burning anything out.
Anyway here's the latest, last week got the passenger door message omg ! aswell as same old fault,courtesy light on couldn't lock it Nightmare ! so I found on here problem solved. I first sprayed the locks with electrical contact cleaner plenty of. then same with wd40 sorted ! next day same again with wd40 and next day cars running like a dream! wtf ! See how long it lasts.
The car is immaculate in and out low mileage so I thought the other day I'm gonna take it to jaguar dealer and pay through the nose. surely they will have to find the fault? I've eliminated the fuel pump filter and plugs I also checked and cleaned the maf sensor. So if they change any of them and the problem returns surely I can keep taking it back for free till they solve it am I wrong?