Thread: Gasoline odor

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Dave, I don't think you want that first part of your loop because if you will tend to condense vapors over time and they will settle in that low spot. I believe your hose should slope up from the vent connection to your high point, then perhaps turn down. I still don't see any value in having it drop down to tank level, but I don't think you want any low points in that line.

I think I will add a riser like yours to my trunk mounted tank, just for grins. My vent line will run up to the top of the trunk, only about 6", then drop down to a drain fitting through the floor.

Originally Posted by rspears

Dave, I don't think you want that first part of your loop because if you will tend to condense vapors over time and they will settle in that low spot. I believe your hose should slope up from the vent connection to your high point, then perhaps turn down. I still don't see any value in having it drop down to tank level, but I don't think you want any low points in that line.

I think I will add a riser like yours to my trunk mounted tank, just for grins. My vent line will run up to the top of the trunk, only about 6", then drop down to a drain fitting through the floor.

Roger, at this point it's trial and error with the hose held only by cable ties. What I did is put a basic liquid trap in the line. If it doesn't work, then I'll see what else can be done including your suggestion. Unfortunately I'm trying to work with a fully upholstered car, including the trunk and really don't want to pull it out unless that's the last resort

Originally Posted by IC2

Roger, at this point it's trial and error with the hose held only by cable ties. What I did is put a basic liquid trap in the line. If it doesn't work, then I'll see what else can be done including your suggestion. Unfortunately I'm trying to work with a fully upholstered car, including the trunk and really don't want to pull it out unless that's the last resort

Dave,
I understand the pain of working with a newly finished car, and I would consider this to be a winter project, if needed. My concern is that a liquid trap is going to work. You will condense in that line over time, and then once you have a seal the tank pressure has to overcome that seal to vent. At some point you are going to get enough condensation that on a nice, hot day you fill the tank, park in the sun and as the tank expands you will finally overcome the head pressure on the liquid seal and burp fuel out your vent line. I think a vent needs to slope up from source to the peak. A "J" at the top keeps water from entering if you are planning to ford creeks, but other than that I believe it can terminate at the apex. Any condensation of vapors will then run back to the tank.

I guess that the next step will have to wait until Sunday/Monday - I got up at 0 dark 30 this morning and have driven to the furthest corner of Virginia from home, 677 miles. When I left home, no trace of odor, but......more to come, I'm sure.

Originally Posted by IC2

I guess that the next step will have to wait until Sunday/Monday - I got up at 0 dark 30 this morning and have driven to the furthest corner of Virginia from home, 677 miles. When I left home, no trace of odor, but......more to come, I'm sure.

Did you drive the roadster?