[s-cars] Boost problem

[Tue]

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So many problem with my UrS6 (year 95.5)that really get me sick of it. Firs=
t the front shock follow by the ignition coil was bad, the fuel pump dead. =
Now the latest symptom is the motor could run smooth from the first start a=
nd had shown nothing wrong drive out with very powerful, It gone all the wa=
y up to 2.1(The stock boost pressure on the computer) suddenly its lost the=
 boost to 1.5 then no more boost can go up to the same level again till sto=
p the engine and restart then I can boost up to 2.1 once more. Any one had =
a clue where should I start with. It seems to me that the ECU tells the was=
te gate to control the boost pressure but it wouldn't stop and back to the =
normal state.

Many thanks in advance.

SS
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