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ssaltuc · July 23rd, 2006, 05:37 PM

I replaced my original gas cap for my 70 cutlass recently. The origianl readn ot vented as does the new one. I replaced it due to fuel leaking out around the seal. I know that the gas tank needs to be vented but I think that I need a vented gas cap. I haven't looked to see if my tank isvented, but after driving her for a while I think the pressue builds up and causes it to bog down under heavy excelleration. Can this happen?
When I take the cap off, the WHOOSH is there so it's not being vented. Tomorrow I'l crawl under her to see if there are vent hoses up on top but I know that I have 2 lines going from the tank directly to the mech fuel pump.
Can anyone let me know A. if not properley vented will this cause the engine to bog down. B. If I ahve 2 lines going to the pump, wouldn't I beleive ther eturn line act as a vent?

July 23rd, 2006, 05:37 PM	#1 (permalink)
ssaltuc Junior Member Join Date: May 2006 Location: NJ Posts: 7	Gas Cap I replaced my original gas cap for my 70 cutlass recently. The origianl readn ot vented as does the new one. I replaced it due to fuel leaking out around the seal. I know that the gas tank needs to be vented but I think that I need a vented gas cap. I haven't looked to see if my tank isvented, but after driving her for a while I think the pressue builds up and causes it to bog down under heavy excelleration. Can this happen? When I take the cap off, the WHOOSH is there so it's not being vented. Tomorrow I'l crawl under her to see if there are vent hoses up on top but I know that I have 2 lines going from the tank directly to the mech fuel pump. Can anyone let me know A. if not properley vented will this cause the engine to bog down. B. If I ahve 2 lines going to the pump, wouldn't I beleive ther eturn line act as a vent?