96 Firebird Gas Odor Problem.........


KENNY GUIDO
10-01-2006, 05:46 PM
Hello again! I dont know if many remember me but I had purchased a 1996 FIREBIRD from an auction. It was a fresh water flood recovery with only 54,000 miles on it. I had spent a good 6 months trying to repair the car. right now it is in MINT condition. it has 54,000 miles on it now (1 year later) and I had to replace the power window motors over the year. everything is fine now except for this major problem:

when I get into the car at times, I would smell "raw gasoline" within the car. It doesnt happen all the time. My mechanic noticed it as well and they tried looking for the cource but were unable to find it. Im kind of scared now because I heard on the news that a man was burned alive in his car by a simalar incident. He was smelling raw gas in the car and he was going to take it the shop the next day but a witness said they saw a "spark" in the car then the whole entire interior of the car was engulfed in flames, taking the mans life.

does anyone know what is the matter? I dont recall any gaslines going into the interior of the car. thanks!

ikeyballz
10-02-2006, 02:47 AM
i have the same problem..try get your car scanned fora code, my car has the code for the charcoal canister, or the 'purge canister'..

KENNY GUIDO
10-02-2006, 07:49 AM
i have the same problem..try get your car scanned fora code, my car has the code for the charcoal canister, or the 'purge canister'..


thanks, but I dont understand how the purge canister would have anything to do with it. I know some stuff about cars but how will this allow a gasoline odor in the car and not outside?

ikeyballz
10-02-2006, 06:15 PM
something about the purge canister letting gas in/out.. im not really sure about that eithier..but my car started smelling like gas after i heard a 'pop' while filling up the tank..soon after, the CEL went on for the purge canister...so.. i sort of put the two together..

ikeyballz
10-02-2006, 06:16 PM
*gas vapor..etc.. (not to sure on thsi topic.)

KENNY GUIDO
10-02-2006, 06:26 PM
I told my mechanic that it would give off a code and he said when he scanned it with the comp, it gave no code. He then said he too, smelt the gas then when he put it in the bay/life, the gas odor was gone after starting it.

so, it seems that my problem seems to be when the car sits for some apparant reason.

CreepingDeath94
10-04-2006, 06:46 AM
Any chance the seal/gasket at the top of the tank is leaking/faulty? That may cause a smell that gets worse as it sits. Also, if the gas cap was left loose...though that would probably smell stronger outside the car as wella s set off a code and check engine light...just trying to throw some things out there to look into.

KENNY GUIDO
10-04-2006, 07:02 AM
Any chance the seal/gasket at the top of the tank is leaking/faulty? That may cause a smell that gets worse as it sits. Also, if the gas cap was left loose...though that would probably smell stronger outside the car as wella s set off a code and check engine light...just trying to throw some things out there to look into.

its definetly not the gas cap. I thought about the seal/gasket on top of the gas tank but wouldnt I smell it outside the car as well? the ordor is only on the inside of the car, and it seems to be random. He did say it could be the carbon canister since I bought it up to him, but its not giving him the computer code.

KENNY GUIDO
10-04-2006, 07:47 AM
Ok, ive narrowed it down to this:

when I start the car in the morning: its fine. I drive around for a while, then park it. it will sit for 20 minutes then I get back in the car, I smell gasoline it happened twice already this morning.

CreepingDeath94
10-06-2006, 06:27 AM
Well, it basically doesn't happen until the fuel system pressurizes then it sounds like. So its not going to be things like gas caps. Could possibly be a leaking fuel line under the car...though that should smell outside the car as well...honestly, anything having to do with the fuel system that is leaking and causing an odor in the car should be smelt outside the car too. it may just be that the wind and outside air are overpowering/clearing the smell away where as in the car it lingers due to the lack of ventilation. Check your fuel lines...otherwise Id have to go with the canister as well.

KENNY GUIDO
10-06-2006, 07:05 AM
thanks, it sounds like the canister is the only viable culprit. We couldnt figures anything else out. no leaks anywhere on the gas lines, tanks or anything. I will check the canister out and let you guys know. thanks!!

fire96
10-22-2006, 03:08 PM
hey, i know i'm kinda late joining this topic but i was wondering if you had replaced the canister yet and wether or not it worked for you,because i have the exact same problem with my 96 bird. also wanted to know if its a replacement i can do myself?/part cost? thanks, john

hotrod_chevyz
10-24-2006, 01:59 PM
If its not throwing ANY trouble codes, the problem could be a leaking injector or injector seal. Once the car is off, fuel could be wasting past the injectors into the fuel rail, or it could be a injector seal is dumping fuel onto the top of the motor. Either way you should only be able to smell it standing down wind from the tail pipe. You could have an exhaust leak under the belly of the car. I would be more worried about brain damage from exhaust fumes, than your car exploding with you in it.

KENNY GUIDO
08-03-2007, 07:59 PM
If its not throwing ANY trouble codes, the problem could be a leaking injector or injector seal. Once the car is off, fuel could be wasting past the injectors into the fuel rail, or it could be a injector seal is dumping fuel onto the top of the motor. Either way you should only be able to smell it standing down wind from the tail pipe. You could have an exhaust leak under the belly of the car. I would be more worried about brain damage from exhaust fumes, than your car exploding with you in it.

its giving a code, but that code says theres a "misfire". I havent been able to locate the problem, whether its a faulty sparkplug or bad wire.

The smell of gas that it was is not the vapor gas. its actual "raw" gasoline I smell right after I stop the engine.

hotrod_chevyz
08-03-2007, 09:47 PM
Once the car is off, fuel could be wasting past the injectors into the fuel rail,

What i meant was the injector could be leaking gas into the intake...


or it could be a injector seal is dumping fuel onto the top of the motor. Either way you should only be able to smell it standing down wind from the tail pipe.

If its dumping it onto the motor the odor would be under hood and never make it into the motor to be passed out of the tail pipe DUH..

Maybe gas fumes are getting to me also :screwy:

blindeyed
08-04-2007, 03:17 AM
Wow, way old thread. I'll let it slide and keep it unlocked since the original poster is still inquiring about the same problem.. even though it's almost been a year since it was first posted. Also, the thread has been moved to the "Problem Diagnosis" sub-forum.

Wattsyurz
08-04-2007, 11:39 PM
It may be the filler neck-tank junction. There was a GM recall about pinholes and small cracks appearing near this joint. I had a friend tell me about a smell of fuel as he waited in the car about 20 minutes. One thing to check for sure.

lt1 youngun
03-05-2010, 07:16 PM
i have a 95 camaro and have a pretty bad gas odor as well... but it's not when my car is sitting. whenever i used to make a left turn hard i could smell it for a few seconds. now if i take a turn hard either way i can smell it STRONG for about a minute. any ideas on solutions ? ... on a college budget ?

Ralph123
03-05-2010, 08:47 PM
I have a 99 firebird and had the the same problem of gas smell and car running rough at times. It was the fuel pressure regulator leaking and causing the problem.

lt1 youngun
03-05-2010, 09:59 PM
did you ever notice your car kind of jumping when when you first start driving it ? the reason i ask is because if you did then i think that might be the problem . keep in mind this gas odor is very strong too and i can smell it in and outside.

Ralph123
03-05-2010, 10:51 PM
Yes, on my 3.8L the fuel pressures regulator is located on top of the engine way in the back. A bit of a pain to get to.:jump3:

lt1 youngun
03-06-2010, 06:09 PM
thanks for the help . i found out what was wrong today and because i was gettin the same gas mileage they said that wasn't the problem and smoke out my fuel system for me. ended up being a bad fuel vent solenoid. so if anyone knows how to fix that feel free to inform. most likely just going to let a mechanic do it

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