Pontiac GTA Enhancement information and discussions with Technical DIY and performance tuning information for the hardcore Pontiac GTA Owners and Enthusiasts.
Forum | Register Now | Members | Search | How Do I... | Calendar

Go Back   The GTA Source Page Message Forums > GTA SPECIFIC > GTA TECH

GTA TECH Want to discuss technical topics about your GTA.... engine tuning, mechanical upgrades, problem areas, etc.? Then post it HERE!

Reply
 
Thread Tools Display Modes
Old 05-08-2000   #1
REMOVED USER
Guest
 
Posts: n/a


Fuel Tank

When removing my gas cap I hear a long hiss of air / vapors. My car is an 88 GTA with the standard 350 with no mods. What is causing this and will it affect performance. I have had an 89 Camaro and 98 T/A and I've never seen this before.


Tx.

Jacob
  Reply With Quote
Old 05-09-2000   #2
REMOVED USER
Guest
 
Posts: n/a


Fuel Tank

My 89' GTA has always done that especially if I run the tank down to near empty. This sound I have always taken to be a vacum in the tank created by the gasoline being slowly drained by the fuel pump. Once the air tight gas cap in released the vacum is broken and air rushes into the tank. I don't think you have anything to worry about. I will be interested to read other replies on this issue.
  Reply With Quote
Old 05-10-2000   #3
REMOVED USER
Guest
 
Posts: n/a


fueltank

I have an 87 GTA, and also an 88 Ford Bronco, andI get that hiss with both of them, especially near the end of a tank of gas. I also am pretty sure that this just has to do with the fuel being drained from the tank, and nothing replacing it...so when you twist the cap off, air rushes in to fill the vacuum. Im also pretty sure there is nothing to worry about.
  Reply With Quote
Old 05-11-2000   #4
REMOVED USER
Guest
 
Posts: n/a


Re: Fuel Tank

Thanks for the info.

/Jacob
  Reply With Quote
Old 05-14-2000   #5
REMOVED USER
Guest
 
Posts: n/a


Re: Fuel Tank

Jacob,
Its normal buddy don't worry about it.Some gas caps make it do that its nothing to worry about.It will not hurt perf. at all. Just be careful when you fill up,let the pressure off before you take the cap off all the way.I have a 88 GTA and mine does it to.I wrote the article on 88 GTA true or not? Also I am a mechanic for the police north prec.here in Memphis,TN and I get cars doing that all the time.Your car also has a pressure valve on top of the gas tank for that reason,so don't worry its natural.Hope this helps out some.

Shiloh
  Reply With Quote
Old 05-29-2000   #6
REMOVED USER
Guest
 
Posts: n/a


Air Noise

There is a tight seal with the car on. Have you ever left a cas can outside in hot weather? When you open it up it will hiss at you. Thats why full gas tanks dont seam to explode like empty gast tanks. The lower the fuel gets in the tank the more it can turn to a vapor. It's very commom to do this. (The vacuum is very common) There is no problem what so ever with your car. Depends on the weather and how low you let your fuel get.

87 & 88 Gta owner
Kevin
  Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 01:36 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.