Thanks for the answer, I did not expect that Ва will answer so quickly.

I have found section on this site with detailed description СVT

http://www.volvo300mania.com/forum-uk/viewtopic.php?t=3803

I have disassembled the 4-way valve and have found out a surprise in its design. That its part which ...

Hi!
Please help me to find malfunction in СVT

What vacuum in highways of management between the vacuum valve and СМЕ in different modes and on different speeds of movement of size should be?
I connected vacuum indicator in a highway up to the valve and after it, results have surprised me.
Up to ...