replacement gas tank

[brandy hickman]

My just purchased blazer has a plastic gas tank. I can not fill it with gas, it backs up in the line, there is a small kink in the line going over the frame rail and around the body mount to the entry hole. I have moved the tank back against the rear crossmember to no avail. You squeeze the line and gas comes gushing back out the filler hole. (not good with your wife standing right there!!!) What am i doing wrong? Is there a metal hose attachment to get around the "corner"