Dual tanks bleed over
Thread Starter
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Laughing Gas
Joined: Aug 2000
Posts: 1,005
Likes: 63
From: Eastern, Idaho
Dual tanks bleed over
I filled my front tank and put about 5 gallons in the back one for emergencies. Its a 79 and had the fuel vapor emissions tubes to a charcoal canister. I conected the front and rear vent tubes to each other to keep dirt out of the tanks on the passenger side. Can it suck it over to the tank I am using or what I dont know where all that gas went . I dont think it evaporated in a week and I dont think it leaks but I am not sure.
Posting Guru
Joined: Aug 2002
Posts: 1,214
Likes: 2
From: Minneapolis, MN
Dual tanks bleed over
If you drove it much the gas probably went out the tailpipe(s).
Just kidding. How much did you lose? Did the level in the back tank go up? Are the vent lines open to air or are they tight to each other? The tanks need to vent somewhere!
Also, the vents should be connected to the top of the tanks so they shouldn't draw fuel.
I'm thinking a leak. Park on something clean (cardboard?) and look for drips. Could be that what's leaking is evaporating and not very noticable.
Just kidding. How much did you lose? Did the level in the back tank go up? Are the vent lines open to air or are they tight to each other? The tanks need to vent somewhere! Also, the vents should be connected to the top of the tanks so they shouldn't draw fuel.
I'm thinking a leak. Park on something clean (cardboard?) and look for drips. Could be that what's leaking is evaporating and not very noticable.
Last edited by macguyver; Jan 24, 2003 at 06:29 AM.
Thread Starter
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Laughing Gas
Joined: Aug 2000
Posts: 1,005
Likes: 63
From: Eastern, Idaho
Dual tanks bleed over
What should I do with the vent lines? They both go out to the passenger side outer frame. Should I put a long hose one each one and route them to a dry clean place or can I get some gas caps and be ok. I have the unleaded only filler flaps is there any vented gas caps for those? I had about a quarter of a tank and it was gone 5 days later bone dry. I did seem to get a lot more mileage than usual out of my front tank which is why I think it is siphoning.
