I noticed that before but never really cared about it. Here's the deal, when my tank is almost empty, removing the gas cap result in a popping noise from the gas tank. You can also hear the air getting in it b4 the popping.....





is it normal?

do u still have a charcoal canister? did u cap off the vac line going from the gas tank to the charcoal canister?

on a hot day it should whoosh at you (its a sealed system), if its worse that that, it could be a plugged charcoal canister, the small line going into it goes right to the tank, so pull it off and see if anything changes



mike

no most of the emission is still there.....could that be the reason why it sometimes smell like gas in the car??

it could be. on my friends 323 the charcoal cannister plugged and the gas would leak out from the sender unit when you parked the car.



mike

how do i get rid of the charcoal canister?

remove the unit and plug all the hoes

no you can't do that. the charcoal cannister keeps pressure from building up in the gas tank, and yours is probably plugged. you need to get another one, or a vented gas cap



mike

I don't have one, i capped all the lines, haven't had any problems.... https://www.nopistons.com/forums/pub...DIR#>/moon.gif