Just started to find a fairly heavy gas smell in the garage in the morning. Had an aftermarket gas cap that I replaced with an old OEM one, that seemed to lessen the smell for a couple of days, then back to the same gassy smell in the morning. Getting a new gas cap in the morning, hope that will do the trick.

Anyone have any other ideas/suggestions?

Thanks,

Jeff

 

Don't recall anyone with that issue.......except the guy who's stereo installer screwed through the panel behind the seats and into the gas tanks.

 

That's funny, in a serious way. No such luck with my issue

Wonder if my catalytic coverters are clogged?

 

If your gas cap was leaking badly enough to cause fumes in the garage, it would definitely cause a check engine light due to evap (fuel tank ventilation system) leakage. With that said, I kind of doubt the problem is in that system.

I'd be looking more at parts of the fuel supply system - parts that carry pressurized fuel. You could have a leak at an injector o-ring or something like that. Fuel leaks are usually pretty easy to find, but I wouldn't be driving it if you are certain it smells like raw fuel.

edit: are you talking about after it sits for the night or after the engine has been started? Your cat comment has me thinking you are talking about smelly exhaust on cold-start. which is it?

 

No CEL. Smell is not like raw fuel, more like spent (burned fuel) if that makes sense.

PS: car is supercharged and as a fuel pressure gauge. upon start up it shows 60psi and stays constant at 60psi unless I hit the gas. I would suspect this would imply that at least under pressure there is no fuel leak.

Smell is present after car sits in garage overnight. There does not seem to be this smell while the car is running or upon initial start-up in the morning.

 

when you upgraded your motor, did you add any braided fuel lines?

 

What fuel system do you have? Parallel?

 

I suspect a leak at the braided line to -AN fitting. I've got one too. no smell when up to temp, but after I let it sit overnight, I can come out to the car and smell fuel on the drivers side upper corner of the hood.

I'm sure the inner rubber line is not fitting against the ferrel <SP?> just right in one particular spot. I'll fix it before I do my first open track event.

I'd also check to make sure an -AN O-ring adaptors have't backed out a bit if you have ANY aftermarket fuel parts.

 

I have been down this road with a 70 Challenger. It most likely is the hose itself--not the fittings.

The braided hose will "leak" out the gas fumes. Only cure is to get rid of the braided hose or go with a hose that is Teflon lined.

 

just got back from my speed shop. They checked everything and found nothing.

They checked the gas cap, the one I had on, not the new one I got today and found the one on the car was defective. There was moisture on the inner plug that goes down the gooseneck and moisture around the outer ring.

New cap on. Hopefully this will cure the issue.

 

I have a very late '07 (actually has the '08 door sills and floor mats). Anyway, around 50K miles I started to smell fuel (inside and outside) when tank was over half full. Smell was strongest around the filler door. I replaced the gas cap (GM) and also the purge valve/EVAP canister and still had the smell. Very repeatable at over half full. Garage would fill with very strong fumes overnight

I had no visible leaks at all and felt that GM had both an emissions/EPA problem on theirs hands and/or a serious bodily injury/loss of live and/or property loss liability.

I contacted GM at their Lemon Law sight and explained why I felt they were liable and exposed to legal actions. Number is 1-866-636-2273.

Long story short, the driver side tank did have a leak and the dealer said they had seen it before. GM claimed the cost for ONE tank was $3400, but they graciously only charge be $1245 (and that was because I was not the original owner (bought it with 4K miles).

If you are the original owner, call that number and demand a free analysis and parts/labor if needed. Also file a complaint with the NTSB on is issue. Let GM know you are doing that too. GM said they would reimburse me if a recall comes out.

THIS IS A HUGE ISSUE REPORTED NUMEROUS TIMES ON THIS FORUM AND OTHER SITES and seems to be affecting '07/'08 models mainly

Also had the low beam head lamp jumper recall done at the same time.

That said, no smell and my electrical system hasn't fried yet from the low beam recall. I do kinda of missing hallucinating from gas fumes will driving at 80 MPH on TX toll roads though (joke).