It sounds like it could be a vacuum leak, possibly in the large hose from
the air box to the turbo.
>I just completed a 2300mile drive in my Audi and it ran realtively well -
>averaged about 29mpg at about 77mph (with a bike on the roof).
>As of late, though, my car is dempstrating a strange behaviour - as foollows:
>Hard strarting - cold start injector gets it going then it dies and takes 3 or
>so minutes to get it running (at 40degf and hasn't run for 8 hrs).
>Car stumbles and chugs at mid and full throttle acceleration but ok at low
>accelleration. Can genarate full boost but it comes hard. Car runs a little
>over the first temp line normally.
>Idles strange - about 1200 sometimes drops to a more normal 1000rpm but is
>Ok, heres the neat thing - It goes away once in a while - ran perfect this
>morning and at lunch time and ran auful on the way home. Don't think is a
>broken wirte cause is will run well for a few hrs and then bad for days
>it runs bad the diags don;t show a fault which I figgred it would if a wire was
>Tried the diags with the fuse in the fuel relay to no avail.
>I got curious and disconnected the multifucntion temp thingy - car ran much
>better. I can't find any info about it in the Bentleys, what does it do and
>what page is it on.
>Can this cause all these problems? Any other ideas? I was hoping to poke
>around the car this weekend so any help would be appreciated. I apologize if
>this is in the archives pr has recently been discussed - I'm about 20 digests
>behind as I've bben on the road and I don't have web access yet.
>Thanks again for your time.
San Jose, California
'87 560 SL