That is true for your 85.

The later cars carried a recirc button...possibly not a 100% recirc. I always felt it was but I may be wrong. I used it when coming up behind an old pickup or van where I expected those nasty fuel waste fumes.....it worked pretty well.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.