Still can't get my rear multiram valve to work. Front one works ok (well, opens at about 4k) but back one does nothing. There is good vacuum to the solenoid, the diaphram is sound (no leak/hole) and if the diaphram is connected directly to the vacuum, the valve moves ok. I've swopped the electric solenoid from the front to the back and everything works just the same. When i bought the car the EML was on with a fault code for the rear multiram. This was found to be unplugged. Plugged it back in, reset the ECU by dissconnecting the battery, and never seen a fault on it since (2 months ago) EML light hasn't blown. The vaccum hoses are connected correctly (vacuum supply across the end of the solenoid with the controlled output on the spiggot at 90 degrees to the solenoid body)
Has anybody got any ideas? is the ecu at fault but not telling me? is it not understanding engine speed and acting accordingly? or is there something else that monitors intake depression and is not reporting back to the ecu?