idling speed trouble

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   Just recently the when warm the idle speed would creep up to circa 1100 rpm and sometimes drop back down. I thought maybe the idle valve is playing up so I have just this afternoon had a look under the bonnet.

I found three of the domed nuts missing which connect the plenum to the throttle bodies (two from the centre) because the studs have sheared off and one of the hoses connecting to the idle air valve (no 17 on ETK diagram 13_0285) was splitting around the jubilee clip (perished) where it joins to the idle air valve.

Both pipes (including no. 16) are on order plus other bits. I guess the pipes have done well to last 18 years.  

Potential lean running disaster avoided.

How many other peoples rough running problems can be put down to perishing hoses I wonder.

Kevin

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M3Nally Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 28-May-2003 Location: United Kingdom Status: Offline Points: 1302	Post Options Post Reply Quote M3Nally Report Post Thanks(0) Quote Reply Topic: idling speed trouble Posted: 07-September-2006 at 15:15
	Just recently the when warm the idle speed would creep up to circa 1100 rpm and sometimes drop back down. I thought maybe the idle valve is playing up so I have just this afternoon had a look under the bonnet. I found three of the domed nuts missing which connect the plenum to the throttle bodies (two from the centre) because the studs have sheared off and one of the hoses connecting to the idle air valve (no 17 on ETK diagram 13_0285) was splitting around the jubilee clip (perished) where it joins to the idle air valve. Both pipes (including no. 16) are on order plus other bits. I guess the pipes have done well to last 18 years. Potential lean running disaster avoided. How many other peoples rough running problems can be put down to perishing hoses I wonder. Kevin
	E30 M3 Macao blue metallic Evolution 2 E39 530d Sport Auto, Aegean blue Edition, Sat Nav, TV, comms pack etc. E39 540i Auto, Sat Nav, TV, leather, luxo barge

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SHEPSM3 Members Profile Send Private Message Find Members Posts Add to Buddy List Bavarian-Board Contributor UK Sport Evolution. Joined: 26-December-2004 Location: Bristol, UK. Status: Offline Points: 1934	Post Options Post Reply Quote SHEPSM3 Report Post Thanks(0) Quote Reply Posted: 08-September-2006 at 02:00
	Both my old Europameister and my Evo2 has air leak issues. The Europa was the elbow, the Evo2 the small breather pipe which connects from the top of the sump to a breather valve. Easy fixes and made both cars rum a whole lot cleaner.
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