My van recently started to stumble on idle when cold sometimes to the point
of stalling.  When decellerating and putting in the clutch the van will
stall and then catch itself and run and stall and run and stall (only when
the clutch is pressed in).  When it stalls it will start right back up. Once
it warms up it is fine. Temp II sensor and O2 is brand new. Any
ideas?????????