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What is the scuba like tank underneath the van , driver side, underneath van?

(1998 Dodge Ram Van 3500)
in South San Francisco, CA on December 08, 2011
Driver side, towards rear is an onboard generator. Underneath the generator, under the vehicle is what looks like a compressor tank. I want to remove this, but there is black hose that run from the tank that goes up and over the gas tank. I can't see where it terminates. Is this connected to the gas tank in any way? I don't want a vacuum leak if I acidently cut it off. Please advise. It doesn't seem as if the tank is connected to the generator. The tank looks like a scuba tank.
Displaying 2 answers & 2 comments
Popular Answer
Autozone have some popular workshop manuals for free on line once you register (for free) on their website There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate
of Contra Costa Smog and Repair on December 08, 2011
Sounds like you are talking about your evap system. your check engine light will come on. Do not remove.
on December 09, 2011
No, it's not the charcoal canister,or anything related to smog equip, it's a rather long, about two feet in lenght , scuba tank-like in appearance. It has a drain plug at the bottom as well.
of Contra Costa Smog and Repair on December 09, 2011
Is there red and green wire going to a small timer attached to it? Arabic writing on the side.
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