gas smell comming through the vent?

missle281 · 06-29-2007, 09:39 AM

i have just recently started smelling gas comming through my vents . it is very random, comes and goes.. today i smelled it and in the middle of it i turned off my ac and the smell went away, i turned my ac back on and the smell came back.. but then left like 1 minute later..

i have been asking around and nobody really understands why this would happen..

can anybody give me some advice on what to look at?

BNaylor · 06-29-2007, 10:24 AM

Welcome to AF.

It would help to post what year, model and engine size you have within your thread/post.

pontiac8u · 06-29-2007, 10:37 AM

Hi,
This is my girlfriends car. I see she posted and she sent me the link so I could register.

The car is a 1998 grand prix GTP with 3800 supercharged engine
it has 155k, but was from arizona so it's super clean and was very well maintained. It recently had a supercharger put in I was told when we bought it.

I too noticed the gas smell. I haven't had the chance to pull the cover off the supercharger to look around to see if something is leaking.
I was told by a friend that they had a gtp of the same year and somehow an electrical short ignited gas fumes that consequently burned the car to the ground. I was curious to know if this was a common problem (charcoal canister maybe faulty?)

hope that helps a little more. I'll check back later
John

BNaylor · 06-29-2007, 09:12 PM

For safety purposes it would be a good idea to check it out as soon as possible. We had a few members posts pics of their burned up Grand Prixs caused by fuel leaking in the engine compartment.

Remove the engine cover and inspect the fuel pressure and return lines at the fuel injector rail. The connectors have o-ring seals that could cause leaking. Inspect the fuel injector rails. Also, remove the vacuum line to the fuel pressure regulator and inspect for gas contamination due to a ruptured diaphragm. Inspect each fuel injector located at each port at the cylinder heads. There are two o-ring seals - upper and lower.

For evaporative emissions problems a DTC should show causing the SES/CEL light to turn on. Check the vacuum lines to the purge solenoid which go to the evaporative (charcoal) cannister. The cannister is a possibility if the fuel supply system is good.

pontiac8u · 07-09-2007, 03:27 PM

I found it-

The fuel lines that run over the supercharger were leaking at the couplers. a couple of small o rings and we're back in business with no more gas smell.

what a stoopid location for gas lines though. no wonder these are notorious for starting on fire.

thanks for the responses!
John

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