My '86 325e Automatic has always had a low but steady idle. It sits at 600rpm, though should probably be up near 800rpm. It's passed emissions within the last year but recently the exhaust fumes (at idle) are killing me. The entire exhaust is new from the manifold back, no leaks.
City gas mileage has dropped within the past few months but highway seems about normal. (30mpg)
My Bentley has been helpful but I'm hoping someone has some experience here. My ICV works. My AFM adjustment screw has never been touched nor has the ICV valve screw. Fuel Pressure Regulator is new. Fuel filter is new. I've been getting serious headaches if I leave my window down at red lights. Exhaust is not smoky, and doesn't exactly smell super rich. Just extremely, well, toxic.
What exactly is responsible for the fuel/air mixture at idle? If it's not from that list of suspects, what else should I look at?
City gas mileage has dropped within the past few months but highway seems about normal. (30mpg)
My Bentley has been helpful but I'm hoping someone has some experience here. My ICV works. My AFM adjustment screw has never been touched nor has the ICV valve screw. Fuel Pressure Regulator is new. Fuel filter is new. I've been getting serious headaches if I leave my window down at red lights. Exhaust is not smoky, and doesn't exactly smell super rich. Just extremely, well, toxic.
What exactly is responsible for the fuel/air mixture at idle? If it's not from that list of suspects, what else should I look at?
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