SPONSORED LINKS

Pressure under gas cap

Tiny
JASONR015
  • MEMBER
  • PONTIAC FIREBIRD
1996 Firebird 3.8L V6. I have a problem with air pressure building under the gas cap which really decreases the power. When I loosen the gas cap the air hisses out and the power is back. Thank you.
Sunday, June 3rd, 2007 AT 4:50 PM

3 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Are there any codes in the computer?

Sounds like an evaporative cannister purge solenoid problem, not allowing vapors to be purged.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, June 3rd, 2007 AT 6:58 PM
Tiny
JASONR015
  • MEMBER
  • 2 POSTS
Nope, no codes.
Was this
answer
helpful?
Yes
No
Sunday, June 3rd, 2007 AT 9:04 PM
Tiny
TBDK
  • MEMBER
  • 24 POSTS
The problem could be as easy as your gas cap. The gas cap has or is supposed to have vents that allow air to enter the tank as gas is pumped into your motor. If your cap doesn't have vent or they have some how become clogged(I have no idea how) then the air would be able to enter the tank. I would try with the obvious. If you have another car, swap the gas caps for a bit and try it out. If you don't, you may have to pony up the cash for a cap. Ranging from $10 to $30 depending on the type you want(lock, no lock, brand name, etc.)
Good luck fixing your problem.
Was this
answer
helpful?
Yes
No
Wednesday, June 6th, 2007 AT 1:11 AM

Please login or register to post a reply.

Related Gas Cap Content

VIEW MORE

Sponsored links