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[Webby the Bear]

Evening gents.

Ok, so while me and TMF did my cam cover gaskets last week I took the opportunity to swap out the multi ram in the rear of the plenum with a spare one I had. Reason being is however many blips of the throttle I give it or 'give it death' I can't see the rear multi ram working.

So with new one installed (and I'll admit I only tried briefly blipping) I still can't see it move.

Reading Mark's guide it appears that it should move as soon as you put revs on and move again when it hits 3100rpm. Can I clarify that this is correct? If it's not when should I be seeing it move?

Ps front one moves when I 'give it death'.

No EML to signify an electrical fault.

Cheers kids 

[zirk]

Rear Vacuum Pipes fitted correctly?

[Webby the Bear]

Rear Vacuum Pipes fitted correctly?

Yes mate. Checked routing using the guide countless times. Both vac boxes also holding vacuum after shut off.

[GastronomicKleptomaniac]

Thank you for reminding me of yet another job to do on the MV6. .. 

[Diamond Black Geezer]

the front one (just aft of the rad) should kick in at 3100, the rear one doesnt until fairly high up the rev range, maybe 5k, or something, doesn't it?

I've got a description of how, when and where the multiram works but on my work comp, and ive managed to swing some days off, so wont be able to clarify until tuesday the earliest.

[terry paget]

the front one (just aft of the rad) should kick in at 3100, the rear one doesnt until fairly high up the rev range, maybe 5k, or something, doesn't it?

I've got a description of how, when and where the multiram works but on my work comp, and ive managed to swing some days off, so wont be able to clarify until tuesday the earliest.

On early engines with AIVCs the rear ram has to be open at idle to get air to the other bank. On later engines without AIVCs this is not necessary.

[Webby the Bear]

So are we saying that it's in a certain position at idle. Then moves presumably when any amount of revs are put on? Getting confusing now.

Ps, mine does have idle control valve.

[terry paget]

So are we saying that it's in a certain position at idle. Then moves presumably when any amount of revs are put on? Getting confusing now.

Ps, mine does have idle control valve.

At idle throttle is closed, so air admission is by idle control valve into LHS of plenum, and via open ram valve into RHS. Once throttles are opened they admit the air, so AIVC and plenum valve close. Haynes says at 'medium' revs front ram valve opens and at 'high' revs plenum valve opens too.

System works well giving good low speed torque and high speed power. Other makes use variable valve timing which works OK, though I wonder how well it works on 16 year old cars and how repairable it is.

[Webby the Bear]

Thanks.

Pretty much what you said is what I was thinking. So (unless I've misinterpreted) it should move the moment you open the throttles and then again higher in the rev range.

As for being repairable I can't see why it wouldn't be. Tis a mechanical device afterall.

Any suggestions where to go from h re ?

[terry paget]

Thanks.

Pretty much what you said is what I was thinking. So (unless I've misinterpreted) it should move the moment you open the throttles and then again higher in the rev range.

As for being repairable I can't see why it wouldn't be. Tis a mechanical device afterall.

Any suggestions where to go from h re ?

The Omega dual ram system is eminently repairable, that's why I like it. It's the variable valve timing used on Hondas and others that frightens me on old cars.

[Webby the Bear]

I just done a 207cc head gasket with vvt. That was scary as it was only my second hg at work and my first timing chain.

So. I run the old girl and got it back today. Tried all sorts of blipping and 'giving it death'. Still no movement. Is this a tech two jobbie? I understand these can be remotely operated.

Any other ideas?

[serek]

did you check voltage on solenoid?
EDIT: try swap vacuum pipes with one from front valve

[Webby the Bear]

did you check voltage on solenoid?
EDIT: try swap vacuum pipes with one from front valve

No mate I haven't checked voltage mainly because I thought if there was an electrical fault there'd be a CEL.

However definitely worth checking. Presumably it will get voltage at the rpm range it's supposed to work on. So I need to check voltage whilst a not so willing assistant works the throttle?

Are the front and rears identical? That definitely helps for testing purposes:-)

[serek]

did you check voltage on solenoid?
EDIT: try swap vacuum pipes with one from front valve

No mate I haven't checked voltage mainly because I thought if there was an electrical fault there'd be a CEL.

However definitely worth checking. Presumably it will get voltage at the rpm range it's supposed to work on. So I need to check voltage whilst a not so willing assistant works the throttle?

Are the front and rears identical? That definitely helps for testing purposes:-)

they same

[Webby the Bear]

Thanks Serek. So, before I bother TuBy to get them tested am I right that I hook my multimeter up to the live on the multiram plug and a good ground, work the throttle ad look for voltage? is it battery voltage? any info you can give me would be great