Multiram valve number 2...(behind the coilpack)

[calibrated]

What is natural position of multiram valve after 4000 rpm? Should it remain in position for example when engine is off or should it operate in direction of coilpack? (opening or closing inlet)

[zirk]

Open, there both open at full revs (shortest velocity).

Edit, both open at more than 4100.

[calibrated]

Thank you

[polilara]

http://www.omegaowners.com/forum/index.php?topic=90513.0

[terry paget]

But note that valve 2 (in the plenum) must be open at idle on early engines with idle control valves on 2,4,6 side, but should close between idle and 3400rpm to give more torque. I have known them stuck open, so engine ran, with poor low rev torque.

[Kevin Wood]

Yep, I think it's open on all cars at idle to balance the airflow across the banks. It closes once the engine is under load, and opens again at 4100 RPM.

[Webby the Bear]

Not wishing to bump but...

I wanted to double check these were working prior to me doing my proper 0-60 test  I can't get either of them to move  though the car doesn't seem down on power particularly.

So. just so I've got this right...... whilst looking at the rear multiram (plenum) it should move when throttle on...... then at 4100k rpm the front one in the trumpets should move. correct?

if so am I right that it has to be stuck open/closed valves? as I believe any electrical issue will put the EML on (something I found when I forgot to plug it in  )

[Webby the Bear]

ps, just to add I do have hissing when vac lines pulled from vac tanks...so I knowthey are good

[Webby the Bear]

Anyone?

Just to add I got the front one to move. But the rear plenum one is definitely not moving.

I have a spare plenum. Is it worth swapping the valve. Or maybe sticking the spare plenum on. I don't believe it can be electrical as it would throw a code. Any advice welcome.

Ps got the front one to move. Previously I must not have revved it hard enough

[05omegav6]

Anyone?

Just to add I got the front one to move. But the rear plenum one is definitely not moving.

I have a spare plenum. Is it worth swapping the valve. Or maybe sticking the spare plenum on. I don't believe it can be electrical as it would throw a code. Any advice welcome.

Ps got the front one to move. Previously I must not have revved it hard enough

Swapping the plenums is as quick and easy as swapping the solenoid and valve

[Webby the Bear]

Anyone?

Just to add I got the front one to move. But the rear plenum one is definitely not moving.

I have a spare plenum. Is it worth swapping the valve. Or maybe sticking the spare plenum on. I don't believe it can be electrical as it would throw a code. Any advice welcome.

Ps got the front one to move. Previously I must not have revved it hard enough

Swapping the plenums is as quick and easy as swapping the solenoid and valve

Cheers mate. Got to take plenum off anyway as I got some breathers to clean too 👍

[Webby the Bear]

Is the rear multram from a 3l plenum fittable to the 2.5l plenum? It's the only one I have spare. Gutted as I thought I had the full plenum. Grrr

[05omegav6]

Is the rear multram from a 3l plenum fittable to the 2.5l plenum? It's the only one I have spare. Gutted as I thought I had the full plenum. Grrr

All the multiram items are the same

[Webby the Bear]

Is the rear multram from a 3l plenum fittable to the 2.5l plenum? It's the only one I have spare. Gutted as I thought I had the full plenum. Grrr

All the multiram items are the same

Great news. Thanks Taxi 

With the car off I moved the plunger and it seems to move with ease. There was a slight air escaping / sucking type noise from the diaphragm looking thing. Possible air leak causing it not to move I wonder 

[DrAndyB]

I would be interested to hear if you get to the bottom of your issue, as I am convinced my rear multiram is the same.  Front multiram Definitely moves when blip above 4k rmp but rear not move at all.  Moves freely enough when press plunger and no noticeable air escaping and connector to solenoid is in 

Keep posted of your progress