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Re: quattro-digest V4 #191



>WEIRDNESS!   The engine will rev up to about 3000 on its own and the drop
>back down to idle.  It does this continuously.  When I drive the surging
>continues if my R.P.M. are under 3000.  Above 3000 everything seems
normal.
Your ISV (idle stabilizer valve) is malfunctioning,
Avi Meron