maccers
Member Since: 08 Dec 2012
Location: SE Kent
Posts: 273
  
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| Mechatronic / valve body symptoms |
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Hi
Just interested to know what symptoms could be of a damaged/unhappy valve body?
Acceleration can sometimes have a step in a gear, in that it will sit at say 2,500rpm for a bit then move on which is accompanied with a brief hydraulic type noise before smoothly accelerating through the rest of the rev range. This isn't all the time, and is intermittent. I don't know if the hydraulic noise of what sounds liek a valve shifting is just noticeable because it's a V8 and fairly quiet? Gearbox oil is clean, unburnt and full.
I've had a failed TC before on a previous D3, but seems totally different, certainly not a judder, or vibration going on. (Vibration I thought I had before turned out to be seized brake  )
It's hard to put symptoms accurately into words but any input would be gratefully received!
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 10th Oct 2018 5:43 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
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as its a petrol, sometimes if the fuel trim is near the end stop, it can hold the revs before shifting up.
but that doesn't explain the noise
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| 10th Oct 2018 8:57 pm |
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pjm-84
Member Since: 04 Oct 2016
Location: Hampshire
Posts: 2432
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Mine's at 117k and pretty smooth on the change up and down. It's rare for it to hold on until 2500 rpm unless it has some resistance (climbing an hill / moving at a rapid pace "officer") or cold.
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| 10th Oct 2018 9:08 pm |
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maccers
Member Since: 08 Dec 2012
Location: SE Kent
Posts: 273
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It's a strange one. I bought it as a Cat D, so wondering if the impact might have damaged a valve potentially.
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| 14th Oct 2018 10:38 am |
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