Gas Tank Vacuum Sealed?

If you had a shop work on it then i would be looking at the hoses being switched or kinked.
 
sonny said:
If you had a shop work on it then i would be looking at the hoses being switched or kinked.
Click to expand...
Yeah, I did. And they're batting 1000 with me at this point. Already called them but they are closed today,, although I still usually get a reply to emails.
 
Does anyone know if it matters which line gets connected to which connection on the bottom of the gas tank for 'breather hoses'??
The service manual says...'make note of, or mark the position of the two breather hoses at the front left side of the tank, before disconnecting both hoses.'
I know they both are connected to different things, one being the roll over valve, but does it matter what hose gets connected to which nipple on the tank, or are they both the same and what it means by 'make note of the position', just means how they are ran so you don't run them and pinch the lines?? I'm not sure how they were before the dealer removed the tank, and wanted to know as part of my trouble shooting for the tank pulling a vacuum.
 
Yes I believe it makes a BIG difference! One line is simply a water drain line which drains water away from the tank opening. If you lift up the locking cap and look, you'll see a drain hole on the ledge outside of the inside tank opening. This hole drains any accumulated water away from the actual fuel tank opening (I believe the outside ledge is not sealed). The other line is the actual fuel vent line which passes fuel vapors through the rollover valve and into the canister. I think you may have either a pinched/clogged the fuel vapor line or a stuck rollover valve as the water drain line probably has no effect on the tank pressure. I would open the fuel cap, disconnect the fuel vent line going to the canister and gently blow through the line. If you cannot blow back through the vent line, remove the rollover valve a shake it. It should rattle and pass air in one direction (depending on tilt orientation). If it does flow then check the large diameter line coming off the canister and running down behind the starter motor as it may have a bug nest clogging it.
 
Good points I am not sure if it is the same as on the standard Rocket tank but if so the difference assumption is right

two lines but at different levels in the ring of the tank Yellow below runs to the rear port on the tank and then down to the rollover valve. it is higher off the tank then the moisture drain in green (circled on the left) which is flared to collect all the stuff you do not want in your tank. Yours probably has a clog in her light air as described above.



since they are in line with each other when I take mine off I taped them together which holds them at the right stagger easy to put right back on the proper port that way. For me at least!
 
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Thanks!! I assume when you are saying yellow and green, you're referring to your photo? They both look yellow, but if I understand you correctly....the one of the right, raised, runs to the rollover valve, and the one on the left, flat, is the moisture drain? I think somewhere in here though one of them has to connect to the EVAP canister.
 
Most likely a pinched line, kinked hose or plugged vent line. Never overlook the Yellow Sac Spider plugging a vent line. Its a problem with cars and if you don't believe me just ask my son. $100 to get them cleaned out on his Ford Explorer as be couldn't fill his gas tank with the vent plugged.


Why Do Spiders Apparently Like Cars So Much?
 
So in the process of trouble shooting I've found that the two line from the tank did not appear to be pinched. Mechanic did not remove the evap canister so it is the way it's always been. I talked to him but I can tell either way as all the dirt is undisturded. (Although the hose routing dose not match up with the diagrams in the service manual. Although maybe the one I have is old)
Question...the rollover valve...the orientation of the arrow is pointing up?? Correct??
I'm also wondering if it's possible the valve was sticking.
 
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