Hi thanks for the replies. I have managed to sort this out myself. I have a code reader and one of the errors was glow plugs. The injectors and glow plugs are on the same circuit so a glow plug error can upset the injector circuity. Anyway I disconnected the glow plug fuse and reset all errors and hey presto all good car running not even in limp mode.
I did feel quite pleased about this really as scrapping the car didn't seem right at all. At the Volvo prices it was touch and go though, and it seems they were barking up the wrong tree with injector replacement. I suspect I would have had to have new injectors and then new glow plugs from them to get it working. This would definately have been more work than the car was worth. Also original battery fine now just overnight trickle charge was good enough.
I don't think I will darken the Volvo dealers doors again. Hopefully not anyway.
Thanks again for your replies. Glad I persisted in trying to fix it.
S40 Man
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