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Thread: Another one with dull response

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    Angry Another one with dull response

    Iv read through post after post on this topic but don't think this one has been covered.

    I have a 1.9cdti 150 55 plate vectra and it's developed a dull/dead response before the turbo kicks in. No dash lights have come on nothing to suggest the reason for it's poor running.
    Iv had the EGR valve off (well caked up) and cleaned all that out, Iv blasted redex through her, de coked as much as I can pull off it. The actuator arm moves fine for the swirl valves, well I think it does. My question is: through how many degrees (ish) can you see the top of the swirl valve move when everything is ok?
    Iv read somewhere that the module "learns" to addapt one way but can reverse. So if this is the case and my swirl valves are caked up has it learnt to stop the valve before it jams/settles in the carbon build up? As a result there isn't sufficient air flow past the valve because it is so caked up but from the outside the swirl valve seems to be working correctly.

    I hope that made some kind of sense to you all I also hope you can help before I take a lump hammer to it.

    Bov

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    Regular Member lee gsi's Avatar
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    Clean the boost sensor first as that made most of the difference on mine.

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    Regular Member Grumpy1954's Avatar
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    What's actually happening, is it rolling up to junction/roundabout, put foot down gently and nothing happens? Then turbo kicks in? I had that when I first had mine, assumed it was an autobox thing. The airbox mod and a K & N helped.

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    In neutral, first, second and so on put your foot on the accelerator and the climb up to the turbo kicking in is really really slow. After cleaning the the valve out the response when the turbo kicks in it much better but no change to pee turbo. In second gear with your foot flat to the floor I could run faster until the turbo kicks in. This is not normal as the car never used to do it, I don't want to mod around the problem I'd like to try and fix it, but it's an idea.

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    Has the rod come off the back of the manifold? Also when you cleaned the egr valve did you make sure the plunger was moving freely?

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    Nup it's still attached and yep the plunger is free as a bird, I bathed it in brake cleaner and scrubbed with a tooth brush...good as new.

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    Vectra-sport Admin Dre's Avatar
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    i had a similar problem in the end a new egr valve cured it

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    Full Member Aikon58's Avatar
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    I've just unplugged my egr valve for now.

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