gas smell
Thread Starter
Member
Joined: Sep 2002
Posts: 171
Likes: 0
From: montreal, QC Canada
Car: Malibu 80, T/A 87, S-15 87
Engine: 267 Bu, 305 T/A, 350 S-15
Transmission: Auto Bu, 5spd T/A, Auto S-15
gas smell
My car is in my garage (it's small) i have a bad gas smell, i've look under it, no leaks found...
I found that the "CARB" is where the smell is the strongest... (i'll recheck the canister) should my 87 carbed engine smell like that!? (a heated garage so, not much fresh air comes in.
I have average mileage of 350km = 220mile with a full tank--> that's if my fuel gauge is accurate.
I found that the "CARB" is where the smell is the strongest... (i'll recheck the canister) should my 87 carbed engine smell like that!? (a heated garage so, not much fresh air comes in.
I have average mileage of 350km = 220mile with a full tank--> that's if my fuel gauge is accurate.
Thread Starter
Member
Joined: Sep 2002
Posts: 171
Likes: 0
From: montreal, QC Canada
Car: Malibu 80, T/A 87, S-15 87
Engine: 267 Bu, 305 T/A, 350 S-15
Transmission: Auto Bu, 5spd T/A, Auto S-15
all stock
Yes everything is stock the smell come from the carb, i know there is some gas in the "Bowl" but when i turn the engine off, the gas in the bowl is a "reserve" for the next start up, if i start the car 1 hour later, i dont need to give gas for it to start, but if i let it all night, i'll have to pump the pedal once.
Moderator
Joined: Jan 2000
Posts: 19,655
Likes: 309
Yanfoo,
Your starting mode seems to be normal. Warm starting (within a couple of hours) shouldn't require added fuel.
I have had a similar issue with moving cars from the cold outdoors into a heated garage. The fuel and vapor in the tank tends to expand as it warms up, forcing vapor to the EVAP canister. If the tank is nearly filled, some liquid can also be forced into the canister, saturating it quickly. The EVAP purge system needs to be functional, and the car needs to be driven long enough to enable the system to purge all the fuel valor/liquid from the canister.
More likely the EVAP canister is saturated and may need to be replaced. Since your car is an '87, you may still have one of the canisters with a filter on the underside. If this filter is plugged, the EVAP will never purge out the liquid/fuel vapors.
If there is no filter or if the filter is clean, you may have a problem with the purge control. Check all the vacuum and fuel system hoses for leaks. Test the solenoid. Understand that the canister will not purge until the car is in closed loop mode and is fully warmed, and driven at moderate cruise long enough to purge the EVAP system. If liquid fuel drips out when you invert the canister, it is saturated and needs to be purged. You can "cheat" by connecting a manifold vacuum line directly to the purge fitting with the engine running, allowing time for the engine to suck out all the fuel vapor.
Another good idea to prevent this from recurring is to not overfill your tank in the winter. Don't fill it all the way up to the top of the filler neck, or there will be no air space in the tank to control tank pressure when it warms up.
- - - - - - - - - - - - - - - - - - -
"December 7th, 1941. A date that will live in infamy."
- - - - - - - - - - - - - - - - - - -
Every idiot I see driving a Honda or Toyota with an American flag stuck out the back window is going in the ditch, so help me Mr. Roosevelt.
Your starting mode seems to be normal. Warm starting (within a couple of hours) shouldn't require added fuel.
I have had a similar issue with moving cars from the cold outdoors into a heated garage. The fuel and vapor in the tank tends to expand as it warms up, forcing vapor to the EVAP canister. If the tank is nearly filled, some liquid can also be forced into the canister, saturating it quickly. The EVAP purge system needs to be functional, and the car needs to be driven long enough to enable the system to purge all the fuel valor/liquid from the canister.
More likely the EVAP canister is saturated and may need to be replaced. Since your car is an '87, you may still have one of the canisters with a filter on the underside. If this filter is plugged, the EVAP will never purge out the liquid/fuel vapors.
If there is no filter or if the filter is clean, you may have a problem with the purge control. Check all the vacuum and fuel system hoses for leaks. Test the solenoid. Understand that the canister will not purge until the car is in closed loop mode and is fully warmed, and driven at moderate cruise long enough to purge the EVAP system. If liquid fuel drips out when you invert the canister, it is saturated and needs to be purged. You can "cheat" by connecting a manifold vacuum line directly to the purge fitting with the engine running, allowing time for the engine to suck out all the fuel vapor.
Another good idea to prevent this from recurring is to not overfill your tank in the winter. Don't fill it all the way up to the top of the filler neck, or there will be no air space in the tank to control tank pressure when it warms up.
- - - - - - - - - - - - - - - - - - -
"December 7th, 1941. A date that will live in infamy."
- - - - - - - - - - - - - - - - - - -
Every idiot I see driving a Honda or Toyota with an American flag stuck out the back window is going in the ditch, so help me Mr. Roosevelt.
Thread Starter
Member
Joined: Sep 2002
Posts: 171
Likes: 0
From: montreal, QC Canada
Car: Malibu 80, T/A 87, S-15 87
Engine: 267 Bu, 305 T/A, 350 S-15
Transmission: Auto Bu, 5spd T/A, Auto S-15
thanx
Thanx, i'll check my canister (mine is on the left side of the engine)
but my father made me get the car out of the garage
Should i do anything else than put "gas stabilizer" in my gas tank for outside storage. (temp is about 0*c to -15*c here) Sorry i dont know the conversion for Celsius to Farenheit, i know in US you use all Farenheit, but not here.
*If my canister checks good... can there be an issue with the carb, seem to be comming from there(the smell) it's a stock non-cc Qjet (factory yes, it's canadian car) I do have bad mealage (i think that 220miles on a tank is not much, but maybe since my winter beater Cavalier with a 3.1L does about the same mealage.
Anyway the car is outside & should be staying there the whole winter.(inside only when doing some repairs & mods with not :P )
but my father made me get the car out of the garage
Should i do anything else than put "gas stabilizer" in my gas tank for outside storage. (temp is about 0*c to -15*c here) Sorry i dont know the conversion for Celsius to Farenheit, i know in US you use all Farenheit, but not here.
*If my canister checks good... can there be an issue with the carb, seem to be comming from there(the smell) it's a stock non-cc Qjet (factory yes, it's canadian car) I do have bad mealage (i think that 220miles on a tank is not much, but maybe since my winter beater Cavalier with a 3.1L does about the same mealage.
Anyway the car is outside & should be staying there the whole winter.(inside only when doing some repairs & mods with not :P )
Thread
Thread Starter
Forum
Replies
Last Post
Glowsock
Tech / General Engine
2
Sep 11, 2015 11:09 PM
