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  #1  
Old 27-05-2017, 07:34 PM
kwoffa kwoffa is offline
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Default Rough running ?

Strange issue this one,95% of the time my car run's great plenty of pull etc,on start up the idle is acceptable,then once warm settles down to a nice steady idle which slightly increases once warm,so nothing really strange going on,however ocasionly once warmed up i can stop,revs will go down and the car shakes and rattles all over the place,i can increase the revs it then smoothes out if i then can get over 25000 revs so the the vanos comes into to play,it will even itself out again,having spoken to a few people a sujestion has been mentioned of the clutches ? slipping in the Vanos ? which may need replacing,my vanos was rebuilt a couple of years ago by Steve at mr Vanos,so i am not sure what to do,i know when my Vanos was rebuilt the Exhaust side was out.might this be the cause having slipped again? TIA Mel.
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Old 28-05-2017, 06:14 AM
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ian ian is online now
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My car idles at circa 900 rpm when first started then drops to 600 rpm shortly there after. No other fluctuation.

Sounds like something is not quite right, sorry no experience of this. You do well to get to 25K revs though!!!

Good luck,
Ian
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Old 28-05-2017, 07:07 AM
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c_w c_w is offline
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Don't worry, I can get over 25000rpm either 😜

Sounds like it might be worth checking the idle control valve, vac pipes and throttle cable/tension etc.

Not sure if yours an s50 or s54 but they should be about the same. Mine starts from cold and idles about 950rpm, which drops to about 600 when warm. No fluctuations or further changes, except when the aircon is on in which case is tends to just idle a little higher than normal.
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Old 28-05-2017, 07:40 AM
kwoffa kwoffa is offline
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May have the figures wrong however it warms up and settles well,and drives great! and then goes wonky ! all hoses have been checked,icv has been changed,which was a pia.It does sound like a Vanos issue,i checked the filter and there was some dark marking to the right of the filter it did not have an o ring on it,surely this wouldnt cause the issues, it feels like the timing just moves out of sync.. hence the mention of the clutches? in the Vanos being worn i have never read anything on here about this?
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Old 28-05-2017, 08:23 AM
mnbrennan mnbrennan is offline
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Im not aware of the vanos having any clutches, and I don't think it has any opportunity to slip

As above vacuum hoses could be deteriorated. When I looked at mine, the hoses had no chance of holding any air (or lack thereof).

Have you been able to look at any codes? Perhaps when you meet up with Rags I can come along with INPA?
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Old 28-05-2017, 08:37 AM
Fat Tony Fat Tony is offline
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Sounds a bit like the issue I had with idle recently. Vanos solenoids (inlet) needed a little solder sorting.
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Old 28-05-2017, 08:58 AM
kwoffa kwoffa is offline
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OK Tony which is the inlet looking at the vanos.?
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Old 28-05-2017, 02:25 PM
Fat Tony Fat Tony is offline
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I don't know I'm sorry mate, I just handed my keys over to my trusty indie garage
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Old 28-05-2017, 07:38 PM
M1ke M1ke is offline
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Quote:
Originally Posted by kwoffa View Post
OK Tony which is the inlet looking at the vanos.?
Inlet is RHS solenoid, although for the sake of a few extra minutes it's worth checking (or running solder) over both.

If you unplug the solenoids you should get around 5 ohm between two of the pins on the plug (solenoid side).
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Old 29-05-2017, 06:17 AM
kwoffa kwoffa is offline
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Thank's Miike.
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