Re: S4,searching idle, loss of power

["R. Wiratorn" <withu@loxinfo.co.th>]

>Beloved Audi 93 S4 runs great 99% of the time, but on occasion will begin an
>annoying "searching idle".  Rpm's will vary between appx. 800- 2100.  Check 
>engine light will also come on, but will extinguish and run normally after 
>you shut the ignition down and re-start.
>
>
>light comes on.  There is also a definite loss of power upon acceleration,
>especially when you reach about 4000 rpm's, it's as if the timing is being 
>retarded by the computer.
>
        OH.. that's what happen to my 1993 S4 automatic.
        Searching idle and loss of power without reason..em

        They change idle controller and some speed mearsurement in
        the gearbox. They said that  if the speed measurement in gearbox
        is dirty, turbo boost will  inaccurate.  With the new speed measurement
        the car is very healty and automatic box work much better.
        The problem of my S4 at this moment is the boost pressure. It reads
        1.1 bar on the digital instrument all the time, idle, full throttle,
or even
        when not run the engine. I feel I loss a lot of power. I'll have it
checked tomorrow.

                                                                            
    K.ben