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Author Topic: General lack of power :-(  (Read 2259 times)

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omegaman

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General lack of power :-(
« on: 18 January 2007, 20:55:38 »
Anyone got any ideas with this?

My 2.5 1996 CDX auto seems a bit........flat!

I havent had it long but when I got it, it went like a rocket. Its been well serviced etc etc

The main problem is that when you accelerate and the kick down comes in it just sort of feels.......flat.

Also it sounds lumpy when its idling, especially when its in 'D' and you are at traffic lights with your foot on the brake. When you select park or neutral it seems a bit better but still runs a bit 'lumpy'

I've just had new spark plugs and new leads (fitted at Vauxhall dealer)

could it be injectors blocked?
I've tried a few shots of 'Redex' but to no avail

HELP!
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Re: General lack of power :-(
« Reply #1 on: 18 January 2007, 21:00:24 »
Breathers and throttle body?
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TheBoy

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Re: General lack of power :-(
« Reply #2 on: 18 January 2007, 21:01:35 »
Any EML?

Also, check multiram operation.
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omegaman

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Re: General lack of power :-(
« Reply #3 on: 18 January 2007, 21:04:10 »
Thanks for the prompt replies guys but I'm no mechanic........whats an EML??? How would I check the mulitram operation??? And more to the point what is it?!!!!! And how might the breathers not be operational??


sorry to sound thick  :-[
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Re: General lack of power :-(
« Reply #4 on: 18 January 2007, 21:06:23 »
EML = engine mgmt light
Multiram is the air intake that dynamically adjusts to provide a flat torque curve, and consists of a couple of vacuum operated valves...

Where are you?
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omegaman

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Re: General lack of power :-(
« Reply #5 on: 18 January 2007, 21:08:15 »
Quote
EML = engine mgmt light
Multiram is the air intake that dynamically adjusts to provide a flat torque curve, and consists of a couple of vacuum operated valves...

Where are you?


aaaah right....no the EML is fine in that case!

Could be the multiram then....is it easy to check????

I'm in Hereford
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Re: General lack of power :-(
« Reply #6 on: 18 January 2007, 21:08:29 »
There's a how to on breathers here http://www.omegaowners.com/forum/YaBB.pl?num=1152598350 but unfortunately the pictures are missing.
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Re: General lack of power :-(
« Reply #7 on: 18 January 2007, 21:10:43 »
Quote
Quote
EML = engine mgmt light
Multiram is the air intake that dynamically adjusts to provide a flat torque curve, and consists of a couple of vacuum operated valves...

Where are you?


aaaah right....no the EML is fine in that case!

Could be the multiram then....is it easy to check????

I'm in Hereford
Does the eml come on with ignition, and extinguish once started (ie, is the bulb ok)?

The multiram valves you can see move by revving in certain ways - hopefully someone has a piccy with locations...
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omegaman

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Re: General lack of power :-(
« Reply #8 on: 18 January 2007, 21:11:59 »
Quote
There's a how to on breathers here http://www.omegaowners.com/forum/YaBB.pl?num=1152598350 but unfortunately the pictures are missing.

Thats interesting....I've just had the rocker cover gasket done today....I noticed the previous owner had it done just a few months ago.........

Reckon thats the problem?
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Re: General lack of power :-(
« Reply #9 on: 18 January 2007, 21:13:01 »
Quote
Quote
Quote
EML = engine mgmt light
Multiram is the air intake that dynamically adjusts to provide a flat torque curve, and consists of a couple of vacuum operated valves...

Where are you?


aaaah right....no the EML is fine in that case!

Could be the multiram then....is it easy to check????

I'm in Hereford
Does the eml come on with ignition, and extinguish once started (ie, is the bulb ok)?

The multiram valves you can see move by revving in certain ways - hopefully someone has a piccy with locations...

Yes it does come on...as soon as you press the brake pedal it goes off
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Re: General lack of power :-(
« Reply #10 on: 18 January 2007, 21:13:27 »
Blocked breathers will causes rocker gaskets to fail ;)

Has this flatness happened since you did rocker gaskets, or was it same before?
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omegaman

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Re: General lack of power :-(
« Reply #11 on: 18 January 2007, 21:18:40 »
Quote
Blocked breathers will causes rocker gaskets to fail ;)

Has this flatness happened since you did rocker gaskets, or was it same before?

I got the car about.......maybe 6 weeks ago

When i got it, it was fine, no problems with power. Then I noticed oil under it and a strong oil smell in the cabin after a run. This got worse and recently you could see oil running out of the left hand side of the engine and dripping down. The lack of power and the poor running came a few weeks later. The garage said oil had got down into the plugs and they replaced them together with the leads. (they said one lead was faulty)

So they did the rocker cover gaskets and whilst it certainly runs better and doesnt leak oil anymore it just doesnt have that power it had before :(
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Re: General lack of power :-(
« Reply #12 on: 18 January 2007, 21:24:22 »
OK, double check no oil in plug wells, in case they didn't clean out very well.

Also, the leads don't like being baked in hot oil.


Does it miss, esp under load, or just feel flat.  Does the power improve at different revs?
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Re: General lack of power :-(
« Reply #13 on: 18 January 2007, 21:31:00 »
Quote
OK, double check no oil in plug wells, in case they didn't clean out very well.

Also, the leads don't like being baked in hot oil.


Does it miss, esp under load, or just feel flat.  Does the power improve at different revs?

Its really that it just feels flat....I did notice a slight oil smell again but as you say maybe its some oil in the plug wells they didnt clean out??? I'm off on a run tomorrow so maybe that will burn it off???

Its hard to explain it on here.....you know when you drive over those annoying rumble strips on a road??? it just feels like that....sort of 'Choppy'!!!!!!!!

I think the higher the revs the better it gets ....but its getting it there!!!!

Sorry for the crap explanation :P
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Re: General lack of power :-(
« Reply #14 on: 18 January 2007, 21:34:20 »
Quote
Quote
OK, double check no oil in plug wells, in case they didn't clean out very well.

Also, the leads don't like being baked in hot oil.


Does it miss, esp under load, or just feel flat.  Does the power improve at different revs?

Its really that it just feels flat....I did notice a slight oil smell again but as you say maybe its some oil in the plug wells they didnt clean out??? I'm off on a run tomorrow so maybe that will burn it off???

Its hard to explain it on here.....you know when you drive over those annoying rumble strips on a road??? it just feels like that....sort of 'Choppy'!!!!!!!!

I think the higher the revs the better it gets ....but its getting it there!!!!

Sorry for the crap explanation :P
If there is any oil in wells, on on top of cam covers, clean it up asap. Failure to do so will damage HT leads...

If the power returns at certain revs, I would suspect the multirams...
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