Gas Odor after fill up
07-16-2017, 04:59 PM
#1
6th Gear
Thread Starter
Gas Odor after fill up
I posted this in the new member section. I'm new and not that familiar with the navigation on this site. I have a 2003 Coupe. My concern is after a fill up there is a strong odor of gas. It is especially strong after the car is left overnight in the garage. I do not top it off. The was no signs of gas drip on the garage floor. Suggestions or experience.
07-16-2017, 05:10 PM
#2
Safety Car
Possible charcoal filter/ EVAP system problem.
Many of the '03-'04's had tank related issues. A problem with the pipe linking the two tanks. I don't have personal experience with this issue but perhaps someone that does will chime in.
Since it isn't leaking I would assume it is the EVAP system. If so you may have a related code.
Here is how to retrieve codes.
Many of the '03-'04's had tank related issues. A problem with the pipe linking the two tanks. I don't have personal experience with this issue but perhaps someone that does will chime in.
Since it isn't leaking I would assume it is the EVAP system. If so you may have a related code.
Here is how to retrieve codes.
The following users liked this post:
fletchvette01 (07-18-2017)
07-16-2017, 05:27 PM
#3
I had the same issue when filling tank. Gas odor disappeared after gas went to 7/8 to 3/4. Found out left side tank had a hole at the top. When tank was full the gas would "slosh" when driving and would spill out on top of tank causing gas odor. Only fix was to
replace tank.. Had to get a used one, no new available.
replace tank.. Had to get a used one, no new available.
07-16-2017, 11:57 PM
#4
Le Mans Master
My 2001 does the same thing if I go to the gas station a couple blocks away and come straight home and put it in the garage. If I drive a few miles first it is not noticeable.
07-17-2017, 01:24 AM
#5
Melting Slicks
Member Since: Nov 2008
Location: Edmonton Alberta, Canada
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Actually it was only the 04's that had the problems with the failing of the bung that connects the cross over tube to the tank. These were 2004 model year C5's in the VIN range 45110258 through 45125500 with VIN production date range Oct 8, 2003 through March 18, 2004
100% with pulling and posting your codes. There may be any of several codes that will point more closely to a bad gas cap or an evap system issue. 
100% with pulling and posting your codes. There may be any of several codes that will point more closely to a bad gas cap or an evap system issue. 
Last edited by El original; 07-17-2017 at 01:25 AM.
07-17-2017, 06:18 AM
#6
Safety Car
I edited '03's out of my #2 post. 8VETTE7 is the one that is in the know about the tank issue.
I had a charcoal canister problem. When the canister doesn't purge there can be a fuel smell.
I had a charcoal canister problem. When the canister doesn't purge there can be a fuel smell.
07-18-2017, 12:31 AM
#7
6th Gear
Thread Starter
Possible charcoal filter/ EVAP system problem.
Many of the '03-'04's had tank related issues. A problem with the pipe linking the two tanks. I don't have personal experience with this issue but perhaps someone that does will chime in.
Since it isn't leaking I would assume it is the EVAP system. If so you may have a related code.
Here is how to retrieve codes.
https://www.youtube.com/watch?v=SviRjIsy9G4
Many of the '03-'04's had tank related issues. A problem with the pipe linking the two tanks. I don't have personal experience with this issue but perhaps someone that does will chime in.
Since it isn't leaking I would assume it is the EVAP system. If so you may have a related code.
Here is how to retrieve codes.
https://www.youtube.com/watch?v=SviRjIsy9G4
07-18-2017, 12:53 AM
#8
6th Gear
Thread Starter
Reading the other threads, my issue is like others after you run some of the gas out the odor is not noticible. I do not top off. What is the FFS system?
07-18-2017, 05:02 PM
#9
Safety Car
Last edited by Rob 02; 07-18-2017 at 05:05 PM.
07-19-2017, 02:03 PM
#11
6th Gear
Thread Starter
Problem was NOT for the 2003 model year. The VIN range is for cars built in late 2003 (model year 2004) and early 2004.
I looked up your VIN on the C5 Corvette Registry and it was built on Oct 23, 2002. With that build date you are lucky enough to NOT have the FFS fuel system. First build date for FFS equipped C5's is Nov. 22, 2002.
The fuel tank failure that includes the VIN range I posted above is for FFS equipped C5's.
I looked up your VIN on the C5 Corvette Registry and it was built on Oct 23, 2002. With that build date you are lucky enough to NOT have the FFS fuel system. First build date for FFS equipped C5's is Nov. 22, 2002.
The fuel tank failure that includes the VIN range I posted above is for FFS equipped C5's.