Can bad gas cap in my 91 be the cause of the gas fumes iam smelling? - CorvetteForum - Chevrolet Corvette Forum Discussion

Register FAQ Search Today's Posts Mark Forums Read Vendor Directory

C4 Tech/Performance
L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Can bad gas cap in my 91 be the cause of the gas fumes iam smelling?

Reply
 
 
 
Thread Tools Search this Thread
Old 06-17-2008, 11:34 AM   #1
boonie
CF Senior Member
Thread Starter
 
Member Since: May 2003
Location: Sacramento California
Posts: 273
Thanks: 0
Thanked 0 Times in 0 Posts
Default Can bad gas cap in my 91 be the cause of the gas fumes iam smelling?

my mechanic is telling me that the gas fumes that iam smelling in my 91 corvette are being caused by a bad gas cap, is that possible? now my mechanic didn't use a pressure gauge to check the gas psi nor did he check the voltage on the fuel injectors "i think that the 19 yr old injectorse are bad" but he did do a through inspection and he saw no evidence of any gas leaks and thus concluded that my gas fumes must be produced by the bad gas cap "he said that the rubber gasket surrounding the gas cap had deterated causing the fumes" my question can you determine the state of fuel injectors without checking the fuel pressure, without taking the voltage of each injector solenoid? and even if theres no evidence of fuel leakage can my fuel injectors still be the cause of thses gas fumes that iam smelling?
boonie is offline   Reply With Quote
Old 06-17-2008, 12:30 PM   #2
Redeasysport
CF Senior Member
St. Jude Donor '05-'06
 
Redeasysport's Avatar
 
Member Since: Dec 2004
Location: Myrtle Beach SC
Posts: 5,789
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by boonie View Post
my mechanic is telling me that the gas fumes that iam smelling in my 91 corvette are being caused by a bad gas cap, is that possible? he saw no evidence of any gas leaks and thus concluded that my gas fumes must be produced by the bad gas cap "he said that the rubber gasket surrounding the gas cap had deterated causing the fumes"
Yes it is possible get a new one and find out.

Quote:
Originally Posted by boonie View Post
my question can you determine the state of fuel injectors without checking the fuel pressure, without taking the voltage of each injector solenoid? and even if theres no evidence of fuel leakage can my fuel injectors still be the cause of thses gas fumes that iam smelling?
No you cannot "guess" the injectors are bad and I doubt you would be smelling them.
Redeasysport is offline   Reply With Quote
Old 06-17-2008, 12:39 PM   #3
Randy93
CF Senior Member
St. Jude Donor '06
 
Randy93's Avatar
 
Member Since: Feb 2005
Location: Sebastian Florida
Posts: 2,135
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Open your hood when you smell the fumes and see if you smell it there, also not likely, but possible, you canister is leaking or clogged.
Randy93 is offline   Reply With Quote
Old 06-17-2008, 10:59 PM   #4
Slalom4me
CF Senior Member
 
Member Since: Jan 2002
Location: Edmonton AB
Posts: 8,815
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Where is the fuel smell most noticable and under what conditions?

The fuel lines for the L98 in your '91 consist of sections of hose and
sections of steel tubing. Of particular interest are the hose sections that
provide a transition from the hard lines along the frame (ahead of the
filter) to the hard lines that rise up to the fuel rail from the lower front
passenger side of the engine block. There are also hose sections ahead
of the differential and at the top of the tank under the cosmetic plastic
panel that the filler neck rises through.

The car is now nearly 18 yrs old. If you can smell fuel, then my vote is
that you should carefully check each of the sections of rubber hose in
the supply side and in the return side to ensure that the hose is not
weathered so badly that leaks are occuring.

VtVette's thread from last year might be of interest:
My annual post: REGARDING C4 ENGINE FIRES, EVERYONE READ!!!
At the very least, consider carrying a meaningful fire extinguisher.

.
Slalom4me is offline   Reply With Quote
Old 06-17-2008, 11:07 PM   #5
Slalom4me
CF Senior Member
 
Member Since: Jan 2002
Location: Edmonton AB
Posts: 8,815
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by Slalom4me View Post
At the very least, consider carrying a meaningful fire extinguisher.

.
Some thoughts on extinguishers were shared in the following thread
from '05
After the engine fire
.
Slalom4me is offline   Reply With Quote
Old 06-18-2008, 09:13 PM   #6
Lilred87
Junior Member
 
Lilred87's Avatar
 
Member Since: Jan 2005
Location: Woodstock Georgia
Posts: 46
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Yes, The gas fumes you are smelling is comming from the gas cap. I had the same problem. I have been smelling fumes and chasing ghosts under the engine for at least a year. The smell seems to come from the engine but it goes away after about a minute and you can't find it again. Turned out to be a bad cap. 8 bucks, problem solved
Lilred87 is offline   Reply With Quote
Old 06-19-2008, 09:59 AM   #7
pmihaltian
CF Senior Member
Support Corvetteforum!
 
pmihaltian's Avatar
 
Member Since: Dec 2001
Location: Charlotte NC
Posts: 3,784
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by Randy93 View Post
Open your hood when you smell the fumes and see if you smell it there, also not likely, but possible, you canister is leaking or clogged.
pmihaltian is offline   Reply With Quote
Old 06-19-2008, 11:32 AM   #8
89Corvette6spdFX3
CF Senior Member
 
89Corvette6spdFX3's Avatar
 
Member Since: Jul 2003
Location: Livin' on Old Rt. 66! OKC
Posts: 4,862
Thanked 0 Times in 0 Posts
Default

If you really want to check for leaky injectors, turn the ignitionkey to the on position which will pressurize the system. Wait about 20-30 minutes then pull and check the spark plugs. If one is wet and it smells like gas, you have a leaky injector. This is straight from Kilebrew's mouth. This can cause clogged and bad catalytic converters which could cause loss of power.

I'd check all the easy stuff listed above first. Good luck.
89Corvette6spdFX3 is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • Can bad gas cap in my 91 be the cause of the gas fumes iam smelling?
  •  
     
    Reply

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    Charcoal Cannister 72 vette 1972vettman C3 Tech/Performance 6 07-08-2015 10:07 AM
    Gas smell at filler and in cabin robl45 C6 Corvette General Discussion 26 01-02-2015 01:19 PM
    Help: gas fume smell after SC install RedCarrot C7 Tech/Performance 35 12-19-2014 01:45 PM
    91 has a gas leak,smell the gas fumes but can't find the leak my MPG is very bad boonie C4 Tech/Performance 6 06-14-2008 11:17 AM
    Gas Smell When Tank is 1/2 Full+ C2 Gimme1MoreC1 C1 & C2 Corvettes 14 02-26-2008 08:49 PM


    Tags
    91, accord, bad, cap, car, causing, corvette, faulty, fire, fumes, gas, gascap, gasoline, honda, inside, smell, smells

    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    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
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump


    All times are GMT -4. The time now is 07:49 AM.