Fuel odour and LOUD fuel pump

[Delorean Industries]

That is the roll over vapor hose running from the back of the car. 2-4-0 in the parts manual. I think it depends on who put the car together because I have seen plenty of cars without clamps on the steel line end with no visible marks from a clamp present. There should be a clamp on the smaller vapor line and no clamp on the larger brake booster line according to the parts manual. I have seen a number with out though.