Fuel lines - why have 2 ?
This system first appeared on CA state cars in '70. I'm not sure if it was "all" federal in 71 or not, but some 71's had it and by 72, all cars did. Again this changed over the years
Of particular annoyance is the change in fuel filler caps The emissions caps ARE NOT VENTED. They are known as "pressure vacuum" caps and they have spring loaded reliefs to relief vacuum or pressure above certain levels. Ordinarily the tank is vented through the 1/4" line going up front
I believe Steve, OldManMopar first posted this photo:
This system first appeared on CA state cars in '70. I'm not sure if it was "all" federal in 71 or not, but some 71's had it and by 72, all cars did. Again this changed over the years
Of particular annoyance is the change in fuel filler caps The emissions caps ARE NOT VENTED. They are known as "pressure vacuum" caps and they have spring loaded reliefs to relief vacuum or pressure above certain levels. Ordinarily the tank is vented through the 1/4" line going up front
I believe Steve, OldManMopar first posted this photo: