<VV> 828 miles this weekend - car running lean - advice appreciated

[Guus de Haan]

Op 5 okt 2009, om 17:51 heeft BobHelt at aol.com het volgende geschreven:

> In a message dated 10/5/2009 6:04:33 A.M. US Mountain Standard Time,
> guusdehaan at me.com writes:
>
> On our  trip to Germany it was almost on lambda 14,7 all
> the time (mine has  a Safe Guard system with sensor in the exhaust).
> But on the way back  home it started running leaner and leaner (near
> 11). Does anyone  have an explanation what could cause this?
>
>
> Guus,
> 11 would indicate a rich mixture rather than a lean one. Are you  
> sure that
> it's 11:1?

Hello Bob,

The 11:1 was a mistake. I should have written 16:1. It is indeed a  
lean mixture problem. Someone suggested a vacuum leak so I'll check  
for those. Would also explain why the knocking goes away when the  
turbo comes on and delivers pressure, but that's just my assumption.

Guus