2.5 v6 low on power

[Omega russ]

Hi I'm having a problem with my 2.5 v6 it's low on power Till it goes over 3000 rpm then it goes as it always does
I've fitted new plugs
Coolant temperature sensor
I've also tried another air flow meter
Nothing showing up on my vaux com
Or my mates tech 2
Has anybody else had a problem like this?

[BazaJT]

My first thought was,are the multi rams working? I could be way off on this and no doubt someone will be along later to shoot me down and advize better!

[jimbo125]

Check your compression, should be between 12 - 15 bar and no more than 1 bar difference between cylinders My HGs went stripped it and the cylinders where coked up and the valves needed a decoke and lapping compressions are now up and equal

[Doctor Gollum]

My first thought was,are the multi rams working? I could be way off on this and no doubt someone will be along later to shoot me down and advize better!

Good shout, especially if it's a sudden fault

Recheck recent work done and be sure that the various vacuum pipes are properly connected.

There's a guide for testing the multirams

[Omega russ]

Thanks everyone will look at it today
An let you no how I get on

[Omega russ]

Ok I've checked the muti ram that looks to be working ok
I've put a new fuel filter on an it looks like the old 1 has collapsed lots of s#*t coming out of it an it rattling inside
So I checked inside the tank for bits that maybe in there but it looks ok

[Doctor Gollum]

Ok I've checked the muti ram that looks to be working ok
I've put a new fuel filter on an it looks like the old 1 has collapsed lots of s#*t coming out of it an it rattling inside
So I checked inside the tank for bits that maybe in there but it looks ok

Both of them?

[Omega russ]

Yes both moving

[Doctor Gollum]

Ok

Manual or auto?

[Omega russ]

It's an auto

[Omega russ]

What rpm should the rear multi ram open at?

[Diamond Black Geezer]

http://www.omegaowners.com/forum/index.php?topic=90513.msg1155347#msg1155347

[Omega russ]

I might have a intermittent fault with my rear 1 by the looks of it

[Diamond Black Geezer]

I was surprised when you said Multirams were fine, to be honest. It really is classic Multiram failure.

[Diamond Black Geezer]

If you want to whip your plenum off, you can replace/swap fairly easily the actuator/solenoid witht he one on the front intake, or alternatively, the SAI system, they're all, handily, the same. In theory, the SAI only kicks in on startup, so gets lots less use than the others.