Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: calibrated on 13 January 2016, 21:21:12

Title: Multiram valve number 2...(behind the coilpack)
Post by: calibrated on 13 January 2016, 21:21:12
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)
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: zirk on 13 January 2016, 21:55:23
Open, there both open at full revs (shortest velocity).

Edit, both open at more than 4100.
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: calibrated on 14 January 2016, 02:03:32
Thank you
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: polilara on 14 January 2016, 05:44:10
http://www.omegaowners.com/forum/index.php?topic=90513.0
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: terry paget on 14 January 2016, 08:15:26
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.
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Kevin Wood on 14 January 2016, 10:07:13
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.
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Webby the Bear on 20 January 2016, 18:33:35
Not wishing to bump but...

I wanted to double check these were working prior to me doing my proper 0-60 test  :D I can't get either of them to move  :o 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  ::))
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Webby the Bear on 20 January 2016, 19:30:29
ps, just to add I do have hissing when vac lines pulled from vac tanks...so I knowthey are good :)
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Webby the Bear on 23 January 2016, 19:48:19
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
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: 05omegav6 on 23 January 2016, 19:52:10
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 :y
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Webby the Bear on 23 January 2016, 19:57:03
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 :y

Cheers mate. Got to take plenum off anyway as I got some breathers to clean too 👍
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Webby the Bear on 24 January 2016, 14:42:50
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
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: 05omegav6 on 24 January 2016, 14:44:29
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 :y
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Webby the Bear on 24 January 2016, 17:00:46
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 :y

Great news. Thanks Taxi  :y

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  :-\
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: DrAndyB on 25 January 2016, 19:18:37
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  :y
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Webby the Bear on 25 January 2016, 19:42:03
Will do mate :)

I'll be honest it's going to beat least a week. snowed under at the garage and going for weekend away this weekend :) but will keep y'aaall posted :) :y :y :y
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: DrAndyB on 25 January 2016, 21:41:42
 :y Cheers  :y

I was going to give pipes and connectors a check on mine, and I thought the ram sat in different place when engine turned off to when engine on idle ?

Hopefully we can both get sorted.

Fingers crossed its something simple  ;)

Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: steve6367 on 14 May 2016, 19:41:28
Not sure if either of you got this sorted but I have the same problem on one of my 2.5's.

Both move when tested with diagnostics connected, front moves when throttle blipped.

Rear never moves - not when changing form idle to higher revs or with high RPM.
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Diamond Black Geezer on 16 May 2016, 11:20:24
Same 'ere
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Webby the Bear on 16 May 2016, 13:16:32
Hi guys. Nope, didn't sort it. Even with spare ram valve. As there's no eml on I assume it's a new valve needed.
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: TheBoy on 16 May 2016, 17:40:15
Suspect you're all being too soft with it.

If it moves with diag tool, its working (unless someone has put in a non-Omega ECU)
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: TheBoy on 16 May 2016, 17:41:03
Suspect you're all being too soft with it.

If it moves with diag tool, its working (unless someone has put in a non-Omega ECU)
And that's 'dangle berries', as if a non-Omega ECU, diag tool won't move it ;D. What a pleb that TheBoy is.
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: sjc on 16 May 2016, 17:51:21
To test the rear one you need to blip the throttle hard - whack it all the way open quickly.
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: DrAndyB on 16 May 2016, 20:25:05
To test the rear one you need to blip the throttle hard - whack it all the way open quickly.

Same here, rear one seems not to move, even when blipped hard with the front ones coming on !!!

New rear solenoid ?  Plug is in it  :(
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Webby the Bear on 16 May 2016, 20:42:39
I assure you I've given it 'death' and still no movement.
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Diamond Black Geezer on 17 May 2016, 09:09:51
Checking out Mark's tech manual he posted, the rear should move over 4100rpm... as, I'm sure, with Mr The Bear's I ran mine all the way up to the red line, and still nothing.

What I have observed, is that the servo/solenoid thingygummy appears to be identical for the front and rear. Bit of a faff, but surely swapping the front and rear ones round will confirm whether both are working, or that the issue lies somewhere else?
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: frostbite on 18 May 2016, 06:08:29
The rear valve will also  move when the engine starts. I watched them after I replaced the vac tanks,  PO broke the nipples and tried to glue them back on  so non of it was working
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: steve6367 on 18 May 2016, 09:53:27
Suspect you're all being too soft with it.

If it moves with diag tool, its working (unless someone has put in a non-Omega ECU)

I have taken it to the red line, or is it also to do with the speed to wide open?

On my 2.5 (non-dbw) my understanding is that it should move between idle and any revs at all also?
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: TheBoy on 18 May 2016, 17:50:20
I needs to be idle to redline as fast as possible, due to the no-load status of the engine when testing. Its a knack
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: Diamond Black Geezer on 19 May 2016, 11:29:49
Currently parked up in the Sikh Temple's car park...might save redlining her until I'm home in the interests of inter-community relations  :D
Title: Re: Multiram valve number 2...(behind the coilpack)
Post by: steve6367 on 19 May 2016, 16:12:40
I needs to be idle to redline as fast as possible, due to the no-load status of the engine when testing. Its a knack

Should it not move at any time the revs move away from idle also?