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Author Topic: 2.5 v6 low on power  (Read 8866 times)

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Omega russ

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2.5 v6 low on power
« on: 30 October 2016, 07:42:01 »
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?
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BazaJT

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Re: 2.5 v6 low on power
« Reply #1 on: 30 October 2016, 07:55:02 »
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!
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jimbo125

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Re: 2.5 v6 low on power
« Reply #2 on: 30 October 2016, 08:10:14 »
Check your compression, should be between 12 - 15 bar and no more than 1 bar difference between cylinders :y 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 :D
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Doctor Gollum

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Re: 2.5 v6 low on power
« Reply #3 on: 30 October 2016, 08:42:32 »
Quote from: BazaJT on 30 October 2016, 07:55:02
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 :y
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Omega russ

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Re: 2.5 v6 low on power
« Reply #4 on: 30 October 2016, 08:53:19 »
Thanks everyone will look at it today
An let you no how I get on
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Omega russ

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Re: 2.5 v6 low on power
« Reply #5 on: 30 October 2016, 15:48:17 »
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
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Doctor Gollum

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Re: 2.5 v6 low on power
« Reply #6 on: 30 October 2016, 17:43:25 »
Quote from: Omega russ on 30 October 2016, 15:48:17
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?
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Omega russ

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Re: 2.5 v6 low on power
« Reply #7 on: 30 October 2016, 17:52:58 »
Yes both moving
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Doctor Gollum

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Re: 2.5 v6 low on power
« Reply #8 on: 30 October 2016, 17:55:34 »
Ok :y

Manual or auto?
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Omega russ

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Re: 2.5 v6 low on power
« Reply #9 on: 30 October 2016, 19:06:17 »
It's an auto
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Omega russ

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Re: 2.5 v6 low on power
« Reply #10 on: 31 October 2016, 09:38:28 »
What rpm should the rear multi ram open at?
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Diamond Black Geezer

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Re: 2.5 v6 low on power
« Reply #11 on: 31 October 2016, 09:40:55 »
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Omega russ

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Re: 2.5 v6 low on power
« Reply #12 on: 31 October 2016, 14:05:40 »
I might have a intermittent fault with my rear 1 by the looks of it
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Diamond Black Geezer

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Re: 2.5 v6 low on power
« Reply #13 on: 31 October 2016, 14:21:10 »
I was surprised when you said Multirams were fine, to be honest. It really is classic Multiram failure.
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Diamond Black Geezer

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Re: 2.5 v6 low on power
« Reply #14 on: 31 October 2016, 14:43:43 »
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.  :)
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