This stinks..... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lngbed71 · 08-16-2003, 11:48 PM

I have the most stinkiest of gas fumes in side the cab when I'm driving. It's bad. I'm glad I don't smoke or there would be great mushroom clouds of doom everywhere I go.

I see no signs of leakage outside or inside the truck, and I have replaced the rubber lines from the tank to the frame. Jeeeez this stinks, has anyone else had this problem? and what was done to stop the stink.......thanks.

jimfulco · 08-16-2003, 11:50 PM

Check the fuel filler hose

lngbed71 · 08-17-2003, 12:03 AM

Thanks, is it tough to replace?

70c10 · 08-17-2003, 12:14 AM

The rubber o-ring is probably worn out at the top of the tank. Don't fill it all the way until you replace/check this.

**Classic Heartbeat** · 08-17-2003, 12:22 AM

Another spot to check is the sending unit "O" ring, and the little seal on the stud that your sending wire is attached to. WES www.ClassicHeartbeat.com

Longhorn Man · 08-17-2003, 12:25 AM

Being a 71, there is also a hose that loops around from the tank back to the tank (Not sure what it is supposed to do) inbetween the inner and outer wall on the passenger side beside the rear window.
Check to see that it is still in one piece.

lngbed71 · 08-17-2003, 09:54 AM

I'll check out all of the above, thanks.

big blue 72 · 08-17-2003, 09:57 PM

Hey andy, that is where the leak was on the 71 i am building for my wifey!. i just cut it off and it seems to work fine.....till i started the frame off.
virgil
what is that thing anyway?

SLS · 08-17-2003, 11:45 PM

EECS Evaporative Emission Control System

On my '71 350 that 'extra' tube leading out of the gas tank is for vent fuel vapors out of the tank...and the tube goes to the charcoal canister in the engine compartment. Maybe this is it??

According to my Haynes manual:

"An indication that the system is not operating properly is a strong fuel odor."

Check that the rubber tube is not blocked or the canister is not stopped up.

lngbed71 · 08-17-2003, 11:49 PM

There is one line headed out of the tank to the front of the engine bay. The fumes are almost as if you pour fresh gas right from a can onto the floor in the cab. I'm checking the stuff inside the cab first.

Longhorn Man · 08-17-2003, 11:49 PM

Well, I have never messed with one myself, but in the LMC catalog, it just shows it looping in the cab...
I have no idea what it would be...onless SLS is right.

08-16-2003, 11:48 PM	#1
lngbed71 Nothing fits but the oil Join Date: Mar 2003 Location: Gaston, Indiana Posts: 424	This stinks..... I have the most stinkiest of gas fumes in side the cab when I'm driving. It's bad. I'm glad I don't smoke or there would be great mushroom clouds of doom everywhere I go. I see no signs of leakage outside or inside the truck, and I have replaced the rubber lines from the tank to the frame. Jeeeez this stinks, has anyone else had this problem? and what was done to stop the stink.......thanks. __________________ Land of the free Because of the brave

08-17-2003, 12:03 AM	#3
lngbed71 Nothing fits but the oil Join Date: Mar 2003 Location: Gaston, Indiana Posts: 424	Thanks, is it tough to replace? __________________ Land of the free Because of the brave

08-17-2003, 12:14 AM	#4
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	The rubber o-ring is probably worn out at the top of the tank. Don't fill it all the way until you replace/check this. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

08-17-2003, 12:22 AM	#5
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,766	Another spot to check is the sending unit "O" ring, and the little seal on the stud that your sending wire is attached to. WES www.ClassicHeartbeat.com __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

08-17-2003, 09:54 AM	#7
lngbed71 Nothing fits but the oil Join Date: Mar 2003 Location: Gaston, Indiana Posts: 424	I'll check out all of the above, thanks. __________________ Land of the free Because of the brave

08-16-2003, 11:50 PM	#2
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	Check the fuel filler hose

08-17-2003, 12:25 AM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Being a 71, there is also a hose that loops around from the tank back to the tank (Not sure what it is supposed to do) inbetween the inner and outer wall on the passenger side beside the rear window. Check to see that it is still in one piece.

08-17-2003, 09:57 PM	#8
big blue 72 Senior Member Join Date: May 2002 Location: hamilton,ohio,usa Posts: 1,499	Hey andy, that is where the leak was on the 71 i am building for my wifey!. i just cut it off and it seems to work fine.....till i started the frame off. virgil what is that thing anyway?

08-17-2003, 11:45 PM	#9
SLS Finish the'71..or bust! Join Date: Jun 2003 Location: Nashville, TN. Posts: 441	EECS EECS Evaporative Emission Control System On my '71 350 that 'extra' tube leading out of the gas tank is for vent fuel vapors out of the tank...and the tube goes to the charcoal canister in the engine compartment. Maybe this is it?? According to my Haynes manual: "An indication that the system is not operating properly is a strong fuel odor." Check that the rubber tube is not blocked or the canister is not stopped up. Last edited by SLS; 08-17-2003 at 11:52 PM.

08-17-2003, 11:49 PM	#10
lngbed71 Nothing fits but the oil Join Date: Mar 2003 Location: Gaston, Indiana Posts: 424	There is one line headed out of the tank to the front of the engine bay. The fumes are almost as if you pour fresh gas right from a can onto the floor in the cab. I'm checking the stuff inside the cab first. __________________ Land of the free Because of the brave

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