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You should have faith in your local dealer. There not all Idiots!

It would be worth speaking to the master tech and, without insulting his intelligence, show him this thread with the results of...

OK, So I did what I said I'd do and tested my 2004 V70R with No known boost issues.

1) Removed 3 leg plastic cover to access TCV.

(Note: There are two wires to the TCV. One coloured GREEN and...

Right, the first figure of 14v is, as you probably know, alternator output voltage which is totally normal - so must be between 13.5v - 14.5v. Sometimes it can be 14.7v when cold but that's ok too,...