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#1
3rd February 2016, 08:03 AM
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Idle problem please help
Hi everyone I have a problem with my a8 2.8.
The idle is lumpy, the revs do not fluctuate but the engine wobbles if that makes sense. The idle is a little low but it is the same until I Rev it past 1k rpm. The fault codes I have are 01120 camshaft adjustment 1 01121 camshaft adjustment 2 Am i rite in thinking this could be camshaft position sensors? If so does the cam belt have to be removed to replace them? Any other ideas will be greatly appreciated Thanks James 
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#2
3rd February 2016, 08:31 AM
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I recommend having a look at the appropriate engine service manual in the Tech Dump in the D2 common faults section.
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind. Last edited by Architex_mA8tey; 3rd February 2016 at 08:50 AM.
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#3
3rd February 2016, 11:26 AM
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You don't have to remove the belt to get to the back one. Not so sure about the front one, but I will have a look in an hour or so - I have a 2.8 in the workshop
 Those codes don't appear to be faults with the sensors though - they are usually specific, something along the lines of "camshaft position sensor G40 open or short to ground". They sound more like the ECU knows the cam adjustment isn't adjusting properly, as it can measure that with the position sensors. If both sensors had failed it wouldn't run at all, as the ECU would have no idea what the engine was doing. Are you using VCDS or a generic scanner though?
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#5
3rd February 2016, 07:30 PM
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Yes, you can get to both without removing the belt
The driver's side one on the front can be accessed just by removing the belt cover on that side.
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#7
5th February 2016, 07:39 PM
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Thanks everyone for your help.
I'm thinking this maybe fuel related (normally use super unleaded)a couple of weeks ago I filled up with some cheap 95ron fuel at a supermarket as my petrol light came on and they had no super unleaded. Was the only station for miles. I only noticed these symptoms about 50miles after filling up. The symptoms got worse the more fuel I used, this Wednesday I put Half a tank of super unleaded in and the symptoms slowly got better and have went away, yesterday and today I have had no problems what so ever! And no codes Only time will tell I suppose Thanks again for all your help we will see how it goes James
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