Why can't I put gas in my 2004 Nissan sentra?

15

Asked by dneuls Aug 18, 2014 at 09:47 AM about the 2004 Nissan Sentra 1.8

Question type: General

Alot of air blows out when I open the gas cap like its under pressure

6 Answers

15

I was told to buy a new gas cap so I did but that didn't help the problem

39,765

the fuel system is a closed system- but it is vented to prevent a build up of pressure- this is pretty simple, so it sounds like the vent is faulty- it is usually vented through a charcoal canister to prevent gas fumes from reaching the atmosphere- start there-

2 people found this helpful.
10

I assume you take cap off and let air come out before trying to add the gas. Because if not it shouldnt allow gas to enter until then. I notice my car does it more in warmer months than cooler months.

1 people found this helpful.
2,765

Your canister vent may not be operating properly or the canister is clogged up.

1 people found this helpful.
15

thanks so much!! Now where is this canister vent located??

1 people found this helpful.
39,765

look at the top of the gas tank- there are hoses coming out- fuel lines- one of them must be a vent hose- follow it- you can just disconnect it to test and see if that relieves the pressure- you must hook it back up, however or your car will smell like gas-

1 people found this helpful.

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