the svx i just bought does the same exact thing. . . check your catalytic converters. . .
on mine the 3rd one got plugged up from old fuel that was in the vehicle from sitting at the dealership for 1+ yrs.
surprised none of you found out about it for as long as it sat there
I was eyeing it last summer and finally decided to take her this summer.
oh yeah. . . budfreak has replacement cats for $80 i think and shipping is $20