Gas Smell **UPDATED WITH PICS** - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-11-2006, 09:24 AM   #1
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Default Gas Smell **UPDATED WITH PICS**

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I went out lastnight and filled my gas tank up. After that I can now smell gas coming from under the drivers side of the car. I thought that maybe some spilled while refueling (Full Service), but no smell near the gas cap and no visual spillage, just fume smell from under the drivers side of the car about midway.

I dont actually see any gas leaking anywhere so I dont know if its a line or something else.


Anyone else exp. this ever?


I went out this morning to vacuum and clean the inside when I saw a gas puddle under the passenger side. After a little Looking around underneath, it appears that I need a new gas tank and a new Brake? line eventually, but might as well do it while im there. i also see some rust there that im not too happy about and I hope its not the rear floor pan thats rusting out. I'll get through this, but its hard right now seeing i just bought her in February only after two weeks on the road and now this!!



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Old 03-11-2006, 06:42 PM   #2
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Make sure you do not have a fuel line under the car that is weeping fuel..They are prone to corrosion. If the line is okay, try checking the fuel vapor canister operation. they can also cause fuel odors. When you fill the tank, vapors also vent into the canister.
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Old 03-12-2006, 01:53 AM   #3
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Definitely keep watching for drips. Last summer my fuel line started with just a smell here and there but after a couple weeks developed into a steady drip. Loss in gas mileage would tip it off probably.
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Old 03-12-2006, 02:53 AM   #4
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Check the evap lines, I had a similar issue with my car, and it turns out that I had a snapped off hard plastic line that an to the fuel tank.
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Old 03-13-2006, 10:47 AM   #5
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Head over to the driver side of the car and inspect the hoses that run from the fuel door to gas tank. They may be old and rotting out.

There are a few things that can leak on the tank. It looks like the leak is up top.

Up there are:
Fuel door to tank hoses (rubber and prone to dry rot over time)
Seal on the top of the tank for the sender unit (typically once sealed will not leak)
3 sender lines, all can leak with rust over time.
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Old 03-13-2006, 01:05 PM   #6
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I would guess you have a leak in one of the sender unit lines, very typical for these cars.

I just had mine changed a couple of weeks ago, I also replaced the tank while there.

A jobber sender unit cost me $130 Cdn and the tank was $140 Cdn. Be carefull with aftermarket tanks, I saw 3 different tanks that had a slightly misaligned ring in the tank for the sender/pump assembly. In my case the gauge would get stuck at 3/8 tank. They had to remove the tank and trim the tabs on the sender unit to get the alignment correct.

Within the space of a few weeks, I went from smelling fumes to noticing a leak, to seeing a stream of fuel leaking all over my exhaust .

Hope that helps...

Cheers,
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Old 03-13-2006, 01:23 PM   #7
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Quote:
Head over to the driver side of the car and inspect the hoses that run from the fuel door to gas tank.
Ahh the good 'ol Filler tube. I will have to check thatout . I just assumed the leak was coming from the passenger side since thats where the puddle of fuel was, and when I saw the seam of the tank wet, I thought it was the tank, could be a couple of items. We'll soon find out.



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Be carefull with aftermarket tanks
Thanks for that info!! Im going to try and get GM. I have a brother who works at a Buick Pontiac GMC Dealer as a service tech. Can get parts using his employee discout and do the labor at his shop after business hours.

Im going to try and get it in for some other service by mid week and take a closer look at what needs to be replaced.

Im going to have some fun with my camera while at the shop.
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