Yesterday I drove the Mark 250 miles, (the longest I have ever driven it) About 30 miles from home I started to smell gasoline. I pulled over and looked under the hood saw and smelled nothing. I also looked under the car for leaks and nothing. The car ran smooth with no problems or check lights through stop and go traffic the rest of the way home, but with the gas smell still there. I looked it over today and drove it about 30 miles total with the air blowing and no gas smell. Any thought or ideas? I really need to figure out what caused it but don't know where to begin without spending a fortune. Anyone else ever have this happen? I want to take the mark on a trip with the family in late July, but not if I don't have this problem fixed.
I Smell Gas????
- Thread starter DV8R
- Start date
sleeper
Former LOD President
RE: I Smell Gas????
Same thing happened to me on the way back from carlisle. 90 some degrees out, on the highway for hours on end, with the ac blasting, smelled gas. Stopped to check it out, didn't find anything, kept going no problem, hasn't happened since. don't know what it was...
Same thing happened to me on the way back from carlisle. 90 some degrees out, on the highway for hours on end, with the ac blasting, smelled gas. Stopped to check it out, didn't find anything, kept going no problem, hasn't happened since. don't know what it was...
RE: I Smell Gas????
Check the seal on the AC/heater suction. This seal deteriorates and allows the air to come from the engine compartment. My wife complains she smells something everytime we go anywhere in my Mark. I know my seal is bad, because I have gotten rain water in the passenger floor from the leaky seal. I'm gone so much, i just haven't taken the time to fix it.
Roadie
95 Champagne Mark VIII
00 Ford F150 Supercab 4x4
86 Chevy Monte Carlo SS
Check the seal on the AC/heater suction. This seal deteriorates and allows the air to come from the engine compartment. My wife complains she smells something everytime we go anywhere in my Mark. I know my seal is bad, because I have gotten rain water in the passenger floor from the leaky seal. I'm gone so much, i just haven't taken the time to fix it.
Roadie
95 Champagne Mark VIII
00 Ford F150 Supercab 4x4
86 Chevy Monte Carlo SS
sleeper
Former LOD President
RE: I Smell Gas????
[div class="dcquote"][strong]Quote[/strong]
Check the seal on the AC/heater suction. This seal deteriorates and allows the air to come from the engine compartment. My wife complains she smells something everytime we go anywhere in my Mark. I know my seal is bad, because I have gotten rain water in the passenger floor from the leaky seal. I'm gone so much, i just haven't taken the time to fix it.Roadie95 Champagne Mark VIII00 Ford F150 Supercab 4x486 Chevy Monte Carlo SS
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i have the same leakage
thing is, i don't drive it in the rain, except long trips, where the aerodynamics keep the water out anyway.
that seal may play a roll in smelling the gas vapors, but i think the gas vapors are probably coming from some kind of leak in the evaporative emissions control system (charcoal canister). probably got overloaded with vapors and purged somewhere other than the intake.
[div class="dcquote"][strong]Quote[/strong]
Check the seal on the AC/heater suction. This seal deteriorates and allows the air to come from the engine compartment. My wife complains she smells something everytime we go anywhere in my Mark. I know my seal is bad, because I have gotten rain water in the passenger floor from the leaky seal. I'm gone so much, i just haven't taken the time to fix it.Roadie95 Champagne Mark VIII00 Ford F150 Supercab 4x486 Chevy Monte Carlo SS
[/div]
i have the same leakage
thing is, i don't drive it in the rain, except long trips, where the aerodynamics keep the water out anyway.
that seal may play a roll in smelling the gas vapors, but i think the gas vapors are probably coming from some kind of leak in the evaporative emissions control system (charcoal canister). probably got overloaded with vapors and purged somewhere other than the intake.
School Zone
Registered
RE: I Smell Gas????
[div class="dcquote"][strong]Quote[/strong]
[div class="dcquote"][strong]Quote[/strong]Check the seal on the AC/heater suction. This seal deteriorates and allows the air to come from the engine compartment. My wife complains she smells something everytime we go anywhere in my Mark. I know my seal is bad, because I have gotten rain water in the passenger floor from the leaky seal. I'm gone so much, i just haven't taken the time to fix it.Roadie95 Champagne Mark VIII00 Ford F150 Supercab 4x486 Chevy Monte Carlo SS[/div]i have the same leakagething is, i don't drive it in the rain, except long trips, where the aerodynamics keep the water out anyway.that seal may play a roll in smelling the gas vapors, but i think the gas vapors are probably coming from some kind of leak in the evaporative emissions control system (charcoal canister). probably got overloaded with vapors and purged somewhere other than the intake.
[/div]
I had a similar problem on my 93. The car smelled like gas all the time, but there was no visible leakage, and the vehicle ran adequately so I just assumed it was running rich, and would take care of it when I felt like changing off more parts. ::nono::
One day I went to fill up at the local Mobil station, when another customer ran up to my window and told me that he saw fuel coming out from under my car.
I took it straight to the dealer where it turned out that my fuel vapor line had dry-rotted at the spot where it connects to the tank. It was an 11 year old car after all. It cost $450 to have replaced.
[div class="dcquote"][strong]Quote[/strong]
[div class="dcquote"][strong]Quote[/strong]Check the seal on the AC/heater suction. This seal deteriorates and allows the air to come from the engine compartment. My wife complains she smells something everytime we go anywhere in my Mark. I know my seal is bad, because I have gotten rain water in the passenger floor from the leaky seal. I'm gone so much, i just haven't taken the time to fix it.Roadie95 Champagne Mark VIII00 Ford F150 Supercab 4x486 Chevy Monte Carlo SS[/div]i have the same leakagething is, i don't drive it in the rain, except long trips, where the aerodynamics keep the water out anyway.that seal may play a roll in smelling the gas vapors, but i think the gas vapors are probably coming from some kind of leak in the evaporative emissions control system (charcoal canister). probably got overloaded with vapors and purged somewhere other than the intake.
[/div]
I had a similar problem on my 93. The car smelled like gas all the time, but there was no visible leakage, and the vehicle ran adequately so I just assumed it was running rich, and would take care of it when I felt like changing off more parts. ::nono::
One day I went to fill up at the local Mobil station, when another customer ran up to my window and told me that he saw fuel coming out from under my car.
I took it straight to the dealer where it turned out that my fuel vapor line had dry-rotted at the spot where it connects to the tank. It was an 11 year old car after all. It cost $450 to have replaced.
RE: I Smell Gas????
[div class="dcquote"][strong]Quote[/strong]
I have a feeling you may have topped off your gas tank before leaving on your trip and added to much fuel. When filling your tank and the nozzle trips off, stop there. Don't try to squeeze in a few more gallons.
[/div]
This is good advice guys!
The reason you don't want to top off your tank is that the cool gas in the underground tank expands considerably when it gets into a hotter atmosphere and will overflow the tank. this overflow goes to the charcoal canister. the canister is not supposed to take liquid, only vapors. When the canister is flooded, the engine will run richer because a vacuum line from the canister is hooked to manifold vacuum. The idea is to burn the vapors coming off the tank. When the canister gets flooded, it causes a problem.
You also don't want to park your car with the nose down a hill after filling up for the same reason.
When my wife and I separated in 1987, her car was a 1981 Granada. She parked it with the nose down in the driveway of her apartment. The charcoal canister got flooded. The car was flooding and I (still feeling responsible for her) rebuilt the carburetor, but that didn't fix it. Finally it dawned on me. When the engine was shut off, gas would pour into the carb. The carburetor fuel bowl was also vented to the canister when the engine was shut off. The pressure from all the gas in the canister was pressurizing the atmosphere above the fuel bowl and forcing the fuel level down. The fuel was going through the normal jets and into the carb venturi and flooding the engine. Replacing the charcoal canister was what it took to fix her car. I had to think about that one a while before I figured it out.
Roadie
95 Champagne Mark VIII
00 Ford F150 Supercab 4x4
86 Chevy Monte Carlo SS
[div class="dcquote"][strong]Quote[/strong]
I have a feeling you may have topped off your gas tank before leaving on your trip and added to much fuel. When filling your tank and the nozzle trips off, stop there. Don't try to squeeze in a few more gallons.
[/div]
This is good advice guys!
The reason you don't want to top off your tank is that the cool gas in the underground tank expands considerably when it gets into a hotter atmosphere and will overflow the tank. this overflow goes to the charcoal canister. the canister is not supposed to take liquid, only vapors. When the canister is flooded, the engine will run richer because a vacuum line from the canister is hooked to manifold vacuum. The idea is to burn the vapors coming off the tank. When the canister gets flooded, it causes a problem.
You also don't want to park your car with the nose down a hill after filling up for the same reason.
When my wife and I separated in 1987, her car was a 1981 Granada. She parked it with the nose down in the driveway of her apartment. The charcoal canister got flooded. The car was flooding and I (still feeling responsible for her) rebuilt the carburetor, but that didn't fix it. Finally it dawned on me. When the engine was shut off, gas would pour into the carb. The carburetor fuel bowl was also vented to the canister when the engine was shut off. The pressure from all the gas in the canister was pressurizing the atmosphere above the fuel bowl and forcing the fuel level down. The fuel was going through the normal jets and into the carb venturi and flooding the engine. Replacing the charcoal canister was what it took to fix her car. I had to think about that one a while before I figured it out.
Roadie
95 Champagne Mark VIII
00 Ford F150 Supercab 4x4
86 Chevy Monte Carlo SS
sleeper
Former LOD President
RE: I Smell Gas????
That makes a lot of sense... i can't recall if i filled up before this happened, but considering i left maryland and was about halfway through ohio when it started to smell, i must have filled up within a half hour of when it happened. And i probably topped it off, not wanting to have to stop again.
That makes a lot of sense... i can't recall if i filled up before this happened, but considering i left maryland and was about halfway through ohio when it started to smell, i must have filled up within a half hour of when it happened. And i probably topped it off, not wanting to have to stop again.
RE: I Smell Gas????
If it happened when you were on a trip, it probably was the ac seal. The engine should have been using enough gas to keep the tank from overflowing unless you let the car sit for a while after filling up such as when you ate at a restaurant.
Roadie
95 Champagne Mark VIII
00 Ford F150 Supercab 4x4
86 Chevy Monte Carlo SS
If it happened when you were on a trip, it probably was the ac seal. The engine should have been using enough gas to keep the tank from overflowing unless you let the car sit for a while after filling up such as when you ate at a restaurant.
Roadie
95 Champagne Mark VIII
00 Ford F150 Supercab 4x4
86 Chevy Monte Carlo SS
sleeper
Former LOD President
RE: I Smell Gas????
[div class="dcquote"][strong]Quote[/strong]
If it happened when you were on a trip, it probably was the ac seal. The engine should have been using enough gas to keep the tank from overflowing unless you let the car sit for a while after filling up such as when you ate at a restaurant.Roadie95 Champagne Mark VIII00 Ford F150 Supercab 4x486 Chevy Monte Carlo SS
[/div]
Okay, but still, where did the gas smell come from? It doesn't smell like gas outside the car, normally, so the smell shouldn't have been there to leak in.
[div class="dcquote"][strong]Quote[/strong]
If it happened when you were on a trip, it probably was the ac seal. The engine should have been using enough gas to keep the tank from overflowing unless you let the car sit for a while after filling up such as when you ate at a restaurant.Roadie95 Champagne Mark VIII00 Ford F150 Supercab 4x486 Chevy Monte Carlo SS
[/div]
Okay, but still, where did the gas smell come from? It doesn't smell like gas outside the car, normally, so the smell shouldn't have been there to leak in.
RE: I Smell Gas????
[div class="dcquote"][strong]Quote[/strong]
I have a feeling you may have topped off your gas tank before leaving on your trip and added to much fuel. When filling your tank and the nozzle trips off, stop there. Don't try to squeeze in a few more gallons.
[/div]
Not the case in my situation. I had about 1/4 tank of gas when it started to smell. It hasn't done it again, but I have only taken it on 50 mile trips so far.
[div class="dcquote"][strong]Quote[/strong]
I have a feeling you may have topped off your gas tank before leaving on your trip and added to much fuel. When filling your tank and the nozzle trips off, stop there. Don't try to squeeze in a few more gallons.
[/div]
Not the case in my situation. I had about 1/4 tank of gas when it started to smell. It hasn't done it again, but I have only taken it on 50 mile trips so far.
7 sek mark
Registered
RE: I Smell Gas????
my car has the same smell and i have a 94 mark. the top of a few of my injectors are wet so i think they might be leaking
my car has the same smell and i have a 94 mark. the top of a few of my injectors are wet so i think they might be leaking
BlackIceLSC
Registered
RE: I Smell Gas????
Here's my scenario:
1997 Mark VIII LSC with 85k miles-and SCT chip.
cruising along, city streets, no heavy throttle applications...just some hills.
109 degrees out
just over 1/4 tank of gas
cruising with A/C on Max(fan speed at about 3/4 inside cabin)
strong odor of what smelled slightly like gas, but not raw fuel, more of a fuel vapor(like you smell when filling up)
I shut the engine off, checked under the hood, also near the fuel filter, and even opened/vented the gas cap.
No sign of gas leakage at all.
got back in car and continued to drive on-smell was gone....for about 5 minutes...then it cam back real strong. I shut off the A/C and rolled down the windows...it was pretty intense...like a brand new magic marker-type smell...strong chemical/fuel odor.
I even closed all of the A/C vents, windows down, and drove it normally...the smell came and left..as if cycling....
I am lost...I will check the vapor cannister, as well as all fuel return/vent lines..just wondering if this is due to the excessive heat outside? I drove the car last summer in similar temps...105+ on freeway 70+ mph for 90+ miles, A/C blaring...not a hint of odor...
any clues folks?
Here's my scenario:
1997 Mark VIII LSC with 85k miles-and SCT chip.
cruising along, city streets, no heavy throttle applications...just some hills.
109 degrees out
just over 1/4 tank of gas
cruising with A/C on Max(fan speed at about 3/4 inside cabin)
strong odor of what smelled slightly like gas, but not raw fuel, more of a fuel vapor(like you smell when filling up)
I shut the engine off, checked under the hood, also near the fuel filter, and even opened/vented the gas cap.
No sign of gas leakage at all.
got back in car and continued to drive on-smell was gone....for about 5 minutes...then it cam back real strong. I shut off the A/C and rolled down the windows...it was pretty intense...like a brand new magic marker-type smell...strong chemical/fuel odor.
I even closed all of the A/C vents, windows down, and drove it normally...the smell came and left..as if cycling....
I am lost...I will check the vapor cannister, as well as all fuel return/vent lines..just wondering if this is due to the excessive heat outside? I drove the car last summer in similar temps...105+ on freeway 70+ mph for 90+ miles, A/C blaring...not a hint of odor...
any clues folks?
BlackIceLSC
Registered
RE: I Smell Gas????
J...I forgot to mention...the smell was really strong in the trunk when i got home! You might have nailed it.
are these the same two lines at the back of a Gen 1 that just have a blunt end cut, and a slip cover over the ends?
J...I forgot to mention...the smell was really strong in the trunk when i got home! You might have nailed it.
are these the same two lines at the back of a Gen 1 that just have a blunt end cut, and a slip cover over the ends?
Mad1stGen
Registered
RE: I Smell Gas????
[div class="dcquote"][strong]Quote[/strong]
J...I forgot to mention...the smell was really strong in the trunk when i got home! You might have nailed it.are these the same two lines at the back of a Gen 1 that just have a blunt end cut, and a slip cover over the ends?
[/div]
I don't know for sure, but quite possibly.
Well, you really have to disconnect just one as the other one goes back upfront to the charcoal canister, and the other one goes directly to the vapor valve in the tank.
These systems are entirely different between generations, or obd versions, not sure.
[div class="dcquote"][strong]Quote[/strong]
J...I forgot to mention...the smell was really strong in the trunk when i got home! You might have nailed it.are these the same two lines at the back of a Gen 1 that just have a blunt end cut, and a slip cover over the ends?
[/div]
I don't know for sure, but quite possibly.
Well, you really have to disconnect just one as the other one goes back upfront to the charcoal canister, and the other one goes directly to the vapor valve in the tank.
These systems are entirely different between generations, or obd versions, not sure.
BlackIceLSC
Registered
RE: I Smell Gas????
ok...I'll take a look at it today....thanks bud.
ok...I'll take a look at it today....thanks bud.