Blythe, Ca or El Centro, Ca. is what's closest to me, maybe about an hour. You may have a vacuum leak somewhere....But if it passed smog from PO, what hurdles do you have to do other than high idle? Best to just get the hose and connect it to where it needs to go on the air check valve for the visual test and then do smog before messing with it. I remember I was in a battle for about a year trying to pass smog. I still have the error code 11 and I remember posting about it several years ago on here.

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1990 190E 3.0L