gas tank vent line to Throttle body?
Thread Starter
Supreme Member
Joined: Nov 2003
Posts: 1,965
Likes: 0
From: Philly
Car: 85 firebird
Engine: Pos 2.8 pulled and replaced with a 350 tpi motor converted to carb.
Transmission: 700r4, vette servo,shift kit, hayden 15"x8" trans cooler.
gas tank vent line to Throttle body?
Since there isnt many new posts in the v6 section i thought id find something to ask you guys.
I took out my evap can and now i have the vent line ran into the fender with a filter ontop to keep out dirt. I have the vac line that went from the evap can to the TB blocked off.
Someone said something about running the gas tank vent line to the TB. Like the vac line that went to the evap can now can connect to the gas tank vent line.
GOOD IDEA OR NO?
I was thinking the evap can has a vac controlled valve ontop of it. now this only opens when the Tb is open, not when its closed.
So wouldnt hooking the vent line directly to the tb cause a vac leak?
I took out my evap can and now i have the vent line ran into the fender with a filter ontop to keep out dirt. I have the vac line that went from the evap can to the TB blocked off.
Someone said something about running the gas tank vent line to the TB. Like the vac line that went to the evap can now can connect to the gas tank vent line.
GOOD IDEA OR NO?
I was thinking the evap can has a vac controlled valve ontop of it. now this only opens when the Tb is open, not when its closed.
So wouldnt hooking the vent line directly to the tb cause a vac leak?
Supreme Member
iTrader: (8)
Joined: Aug 2003
Posts: 7,240
Likes: 6
From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Actually, now that I've been having the problem, I don't think it is a great idea to connect the vent directly to the TB... It seems as though it will suck excess fuel into the intake charge and cause a rich condition (as if we don't already have one) unless we find another way to keep the liquid gas out of the intake plenum....
And as long as there is something to hold pressure in the fuel system (non vented cap) there wouldn't be a vac leak. However, that idea is erased by the fact that most cars since the late '70's have a vented gas cap, which will cause a vac leak.
And as long as there is something to hold pressure in the fuel system (non vented cap) there wouldn't be a vac leak. However, that idea is erased by the fact that most cars since the late '70's have a vented gas cap, which will cause a vac leak.
Last edited by Maverick H1L; Feb 3, 2004 at 08:00 PM.
Thread Starter
Supreme Member
Joined: Nov 2003
Posts: 1,965
Likes: 0
From: Philly
Car: 85 firebird
Engine: Pos 2.8 pulled and replaced with a 350 tpi motor converted to carb.
Transmission: 700r4, vette servo,shift kit, hayden 15"x8" trans cooler.
I dont run rich at all. I mainly posted this because i was bored and got tired of the same old posts on the v6 forum.Im surprized no one came in here and said my car would explode like they did when i talked about removing the evap can.:lala:
Supreme Member
iTrader: (8)
Joined: Aug 2003
Posts: 7,240
Likes: 6
From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
It seemed like a good idea to me at the time. But it was after 3 a.m. and my mind don't like being up that late. I am going to do the same thing... I hate running rich and smelling the gas all the time! Someone actually said the car would explode... I will not state my opinion of them at this point in time. Well, I can see it happening because of the high temps and sparks in the engine all the time, but it is highly unlikely!
Supreme Member
Joined: Dec 2000
Posts: 2,375
Likes: 0
From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
backfire through intake.
"The department of defense regrets to inform you than your sons are dead because they were stupid." -- Top Gun
"The department of defense regrets to inform you than your sons are dead because they were stupid." -- Top Gun
TGO Supporter
iTrader: (12)
Joined: Jun 2002
Posts: 6,819
Likes: 3
From: AR
Car: 1991 Camaro RS Vert
Engine: 350 S-TPI
Transmission: T5
Axle/Gears: GU5/G80/J65
the 93-95 3.4l has the electric valve mounted up on the engine, and I belive the vent hose went to it... or thats how I routed it on my truck
Supreme Member
iTrader: (8)
Joined: Aug 2003
Posts: 7,240
Likes: 6
From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
And how likely is it that a backfire through the intake would happen on a properly tuned car? Not very likely, without bad timing adjustment or short in ignition system.
Trending Topics
Thread Starter
Supreme Member
Joined: Nov 2003
Posts: 1,965
Likes: 0
From: Philly
Car: 85 firebird
Engine: Pos 2.8 pulled and replaced with a 350 tpi motor converted to carb.
Transmission: 700r4, vette servo,shift kit, hayden 15"x8" trans cooler.
Originally posted by Maverick H1L
And how likely is it that a backfire through the intake would happen on a properly tuned car? Not very likely, without bad timing adjustment or short in ignition system.
And how likely is it that a backfire through the intake would happen on a properly tuned car? Not very likely, without bad timing adjustment or short in ignition system.
Im not in a hurry to find out though, cars running great now. I do need to get a iac valve though. Mine doesnt move at all.
It seems like its always something with the damn 2.8's........ Supreme Member
Joined: Dec 2000
Posts: 2,375
Likes: 0
From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
I'm not saying it's likely.. I am saying, that however unlikely it may be, all it takes is once.. and all you'd need is one critical failure to trigger it.. and instead of your motor dying, YOU could die. If I'm going to die in my car, I refuse to let it be because one of my modifications compromised the gas tank. No way, no how.
Thread Starter
Supreme Member
Joined: Nov 2003
Posts: 1,965
Likes: 0
From: Philly
Car: 85 firebird
Engine: Pos 2.8 pulled and replaced with a 350 tpi motor converted to carb.
Transmission: 700r4, vette servo,shift kit, hayden 15"x8" trans cooler.
Originally posted by TechSmurf
I'm not saying it's likely.. I am saying, that however unlikely it may be, all it takes is once.. and all you'd need is one critical failure to trigger it.. and instead of your motor dying, YOU could die. If I'm going to die in my car, I refuse to let it be because one of my modifications compromised the gas tank. No way, no how.
I'm not saying it's likely.. I am saying, that however unlikely it may be, all it takes is once.. and all you'd need is one critical failure to trigger it.. and instead of your motor dying, YOU could die. If I'm going to die in my car, I refuse to let it be because one of my modifications compromised the gas tank. No way, no how.
i get what you mean now. Under normal hose route a back fire would go out the Tb, no big deal.But if you run the vent line to the tb a backfire could possibly ignite the gas tank
!!!!!!!!!!! damn, never thought of that.
Supreme Member
iTrader: (8)
Joined: Aug 2003
Posts: 7,240
Likes: 6
From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Looks like venting through the wheel well or outside engine compartment is the way to go. How is your fuel mileage with it directed outwards? (I have to ask... fuel does evaporate)
And that is where the vent line goes anyways is through the big PCV pipe and through the top outer vac line on the throttle body
. Am I the only one who pays attention to this stuff?
And that is where the vent line goes anyways is through the big PCV pipe and through the top outer vac line on the throttle body
. Am I the only one who pays attention to this stuff? Thread Starter
Supreme Member
Joined: Nov 2003
Posts: 1,965
Likes: 0
From: Philly
Car: 85 firebird
Engine: Pos 2.8 pulled and replaced with a 350 tpi motor converted to carb.
Transmission: 700r4, vette servo,shift kit, hayden 15"x8" trans cooler.
4 posts up dude i just said the line goes to the TB.
READ MAN READ!!! lol
Gas milage is fine. Its really hard to tell you the differnce between when the can was in and now because when the can was in the car wasnt running as good as it is now because of the leaking intake,timing wasnt correct and g0d knows what else.
Now i have the timing correct. I cleaned everything when i had it apart and did a little grinding, and put in all new plugs,cap,rotor synth oil and trans fluid etc. So of course i get better gas milage now.
READ MAN READ!!! lol
Gas milage is fine. Its really hard to tell you the differnce between when the can was in and now because when the can was in the car wasnt running as good as it is now because of the leaking intake,timing wasnt correct and g0d knows what else.
Now i have the timing correct. I cleaned everything when i had it apart and did a little grinding, and put in all new plugs,cap,rotor synth oil and trans fluid etc. So of course i get better gas milage now.
Supreme Member
Joined: Dec 2000
Posts: 2,375
Likes: 0
From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
Originally posted by Maverick H1L
And that is where the vent line goes anyways is through the big PCV pipe and through the top outer vac line on the throttle body
. Am I the only one who pays attention to this stuff?
And that is where the vent line goes anyways is through the big PCV pipe and through the top outer vac line on the throttle body
. Am I the only one who pays attention to this stuff? Supreme Member
iTrader: (8)
Joined: Aug 2003
Posts: 7,240
Likes: 6
From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
No, actually, if you also could read, I said that I said that at 3 a.m. and was half asleep reading through all this crap, so I just posted the first (although stupid) thing that came to me. I realized the mistake before I saw this topic posted and said so above. So you are the moron, idiot, etc., not me.
And you are talking about being suicidal... I am positive you are one of those who have spread the nitrous power-adding explosive virus around the TGO boards. I won't have the stuff within ten feet of my car. Something goes wrong with that sh|t and you are just as dead if not more so that with the tank vent connected to the TB!
And you are talking about being suicidal... I am positive you are one of those who have spread the nitrous power-adding explosive virus around the TGO boards. I won't have the stuff within ten feet of my car. Something goes wrong with that sh|t and you are just as dead if not more so that with the tank vent connected to the TB!
Last edited by Maverick H1L; Feb 5, 2004 at 01:14 AM.
Thread Starter
Supreme Member
Joined: Nov 2003
Posts: 1,965
Likes: 0
From: Philly
Car: 85 firebird
Engine: Pos 2.8 pulled and replaced with a 350 tpi motor converted to carb.
Transmission: 700r4, vette servo,shift kit, hayden 15"x8" trans cooler.
what is it with people acting like *******s on this board lately? NO one called you a moron or idiot. All i said was read man read, calm the **** down. Damn im tired of the tgo soap opras already
Last edited by br()bert; Feb 6, 2004 at 02:07 AM.
Supreme Member
iTrader: (8)
Joined: Aug 2003
Posts: 7,240
Likes: 6
From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
No, that wasn't you, that was Smurf. And I am getting tired of having to run onto the defensive because of simple questions!
Supreme Member
Joined: Oct 2001
Posts: 8,113
Likes: 6
From: NWOhioToledoArea
Car: 86-FireBird
Engine: -MPFI
Transmission: T5
Axle/Gears: 3:42
Originally posted by Maverick H1L
No, that wasn't you, that was Smurf. And I am getting tired of having to run onto the defensive because of simple questions!
No, that wasn't you, that was Smurf. And I am getting tired of having to run onto the defensive because of simple questions!
Example
Hey man you rock.
Hey man you rock.
What kind of response will I get between the two from you?
"And that is where the vent line goes anyways is through the big PCV pipe and through the top outer vac line on the throttle body .
Am I the only one who pays attention to this stuff?"You were kind of asking for a response like that.
Thread Starter
Supreme Member
Joined: Nov 2003
Posts: 1,965
Likes: 0
From: Philly
Car: 85 firebird
Engine: Pos 2.8 pulled and replaced with a 350 tpi motor converted to carb.
Transmission: 700r4, vette servo,shift kit, hayden 15"x8" trans cooler.
Originally posted by br()bert
Not too likely since the evap can has a vac line going to the TB anyway.BUT removing the evap can and just hooking the hose to the TB does remove the filter ability of the evap can and hose gas fumes directly into the TB. So i dont know
Im not in a hurry to find out though, cars running great now. I do need to get a iac valve though. Mine doesnt move at all.
It seems like its always something with the damn 2.8's........
Not too likely since the evap can has a vac line going to the TB anyway.BUT removing the evap can and just hooking the hose to the TB does remove the filter ability of the evap can and hose gas fumes directly into the TB. So i dont know
Im not in a hurry to find out though, cars running great now. I do need to get a iac valve though. Mine doesnt move at all.
It seems like its always something with the damn 2.8's........
Supreme Member
Joined: Dec 2000
Posts: 2,375
Likes: 0
From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
Originally posted by Maverick H1L
I am positive you are one of those who have spread the nitrous power-adding explosive virus around the TGO boards. I won't have the stuff within ten feet of my car. Something goes wrong with that sh|t and you are just as dead if not more so that with the tank vent connected to the TB!
I am positive you are one of those who have spread the nitrous power-adding explosive virus around the TGO boards. I won't have the stuff within ten feet of my car. Something goes wrong with that sh|t and you are just as dead if not more so that with the tank vent connected to the TB!
Unless you continue with your BS about giving gas tanks fire being a good thing, I'm done with this thread, and I'm done with you Maverick because of the way you flew off the handle at me when YOU were in the wrong. Grow up and learn to admit when you're wrong rather than "wah, it was 3 am".
--- Fin ---
Thread Starter
Supreme Member
Joined: Nov 2003
Posts: 1,965
Likes: 0
From: Philly
Car: 85 firebird
Engine: Pos 2.8 pulled and replaced with a 350 tpi motor converted to carb.
Transmission: 700r4, vette servo,shift kit, hayden 15"x8" trans cooler.
Originally posted by TechSmurf
Well, while I could continue this argument quite easily about nitrous being far safer than giving your gas tank a source of combustion, and nitrous oxide explosions as shown on the Slow and the Disgruntled being almost complete BS, I'd rather just answer the first half of this.. you obviously know absolutely nothing about me. I'm anti-nitrous. Any nitrous thread I've participated in will reflect on this.. but you aren't basing anything you say on facts anyway, so why should you pay attention?
Unless you continue with your BS about giving gas tanks fire being a good thing, I'm done with this thread, and I'm done with you Maverick because of the way you flew off the handle at me when YOU were in the wrong. Grow up and learn to admit when you're wrong rather than "wah, it was 3 am".
--- Fin ---
Well, while I could continue this argument quite easily about nitrous being far safer than giving your gas tank a source of combustion, and nitrous oxide explosions as shown on the Slow and the Disgruntled being almost complete BS, I'd rather just answer the first half of this.. you obviously know absolutely nothing about me. I'm anti-nitrous. Any nitrous thread I've participated in will reflect on this.. but you aren't basing anything you say on facts anyway, so why should you pay attention?
Unless you continue with your BS about giving gas tanks fire being a good thing, I'm done with this thread, and I'm done with you Maverick because of the way you flew off the handle at me when YOU were in the wrong. Grow up and learn to admit when you're wrong rather than "wah, it was 3 am".
--- Fin ---
Supreme Member
iTrader: (8)
Joined: Aug 2003
Posts: 7,240
Likes: 6
From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
You, TechSmurf, make me so dam
! If I could, I would have you on the floor by now, but since this will be locked anyways, I'll just forget it. YOU, sir, are an ***, and if I ever see you in person, I'll let you have it. And I am NOT, read this very carefully, NOT the one who flew of the f**king handle! And I quote: "if you are so UNGODLY SUICIDAL...
but I won't let you take others to your grave". There, now who is the *** who flew off of the handle? I asked a simple question and retracted it after finding some more info on the subject, but YOU continued badger and bitch at me about the original statement without reading first!
ENGAGE BRAIN BEFORE MOUTH AND/OR KEYBOARD!! :nono: 
I am stuck in a world of idiots, of which I am NOT one and neither is the person who started this topic and the original topic I posted this idea in....
And as for why the evap can cannot be disconnected and the other bull****, I DON'T HAVE TO DEAL WITH EMISSIONS as I live in NY and am emissions EXEMPT and I could really use some REAL INFORMATION as to why the thing HAS to be in place FOR ANYTHING OTHER THAN DEALING WITH THE SMOG ***** IN THAT OTHER PLANET CALLED CALIFORNIA!
And br()bert, I think it's great you got your engine going and all, but I have to leave this topic and set of boards behind before I end up in the hospital due to a sudden attack of stupidity (which is VERY contagious, TechStupid!).....
! If I could, I would have you on the floor by now, but since this will be locked anyways, I'll just forget it. YOU, sir, are an ***, and if I ever see you in person, I'll let you have it. And I am NOT, read this very carefully, NOT the one who flew of the f**king handle! And I quote: "if you are so UNGODLY SUICIDAL...
but I won't let you take others to your grave". There, now who is the *** who flew off of the handle? I asked a simple question and retracted it after finding some more info on the subject, but YOU continued badger and bitch at me about the original statement without reading first!
ENGAGE BRAIN BEFORE MOUTH AND/OR KEYBOARD!! :nono: 
I am stuck in a world of idiots, of which I am NOT one and neither is the person who started this topic and the original topic I posted this idea in....

And as for why the evap can cannot be disconnected and the other bull****, I DON'T HAVE TO DEAL WITH EMISSIONS as I live in NY and am emissions EXEMPT and I could really use some REAL INFORMATION as to why the thing HAS to be in place FOR ANYTHING OTHER THAN DEALING WITH THE SMOG ***** IN THAT OTHER PLANET CALLED CALIFORNIA!
And br()bert, I think it's great you got your engine going and all, but I have to leave this topic and set of boards behind before I end up in the hospital due to a sudden attack of stupidity (which is VERY contagious, TechStupid!).....
Supreme Member
Joined: Dec 2000
Posts: 2,375
Likes: 0
From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
Originally posted by Maverick H1L
And as for why the evap can cannot be disconnected and the other bull****, I DON'T HAVE TO DEAL WITH EMISSIONS as I live in NY and am emissions EXEMPT and I could really use some REAL INFORMATION as to why the thing HAS to be in place FOR ANYTHING OTHER THAN DEALING WITH THE SMOG ***** IN THAT OTHER PLANET CALLED CALIFORNIA!
And as for why the evap can cannot be disconnected and the other bull****, I DON'T HAVE TO DEAL WITH EMISSIONS as I live in NY and am emissions EXEMPT and I could really use some REAL INFORMATION as to why the thing HAS to be in place FOR ANYTHING OTHER THAN DEALING WITH THE SMOG ***** IN THAT OTHER PLANET CALLED CALIFORNIA!
Supreme Member
iTrader: (8)
Joined: Aug 2003
Posts: 7,240
Likes: 6
From: LeRoy, NY
Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
I'm so sorry, Smurf. I can't read your prev post because you have been IGNORED. It seems that absoute stupidity runs in your family and NOT in mine. However, I AM one to hold a grudge and you will NOT like our first meeting. I am NO longer going to reply to your senseless bull**** becuase it is totally unrelated to any topic there is on this board. This month started bad and with you is only getting WORSE. If this all started because of a simple g0ddamn
I am sorry, but I refuse to stand by and be insulted by someone who doesn't have the common decency to answer a simple question with a simple answer and to keep their nose out of others' conversations, especially when I was INDIRECTLY the one who started this topic. I have long since decided NOT to do this for obvious reasons, and I know what would happen if I did so, even though it is highly unlikely.
I am sorry, but I refuse to stand by and be insulted by someone who doesn't have the common decency to answer a simple question with a simple answer and to keep their nose out of others' conversations, especially when I was INDIRECTLY the one who started this topic. I have long since decided NOT to do this for obvious reasons, and I know what would happen if I did so, even though it is highly unlikely. Supreme Member
Joined: Dec 2000
Posts: 2,375
Likes: 0
From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
Hmm.. guess he'll never know that the last post was a straight answer to his question with no antagonism attached. Heh.
Thread Starter
Supreme Member
Joined: Nov 2003
Posts: 1,965
Likes: 0
From: Philly
Car: 85 firebird
Engine: Pos 2.8 pulled and replaced with a 350 tpi motor converted to carb.
Transmission: 700r4, vette servo,shift kit, hayden 15"x8" trans cooler.
Originally posted by TechSmurf
Hmm.. guess he'll never know that the last post was a straight answer to his question with no antagonism attached. Heh.
Hmm.. guess he'll never know that the last post was a straight answer to his question with no antagonism attached. Heh.
Thread
Thread Starter
Forum
Replies
Last Post
1992 Trans Am
History / Originality
27
May 10, 2023 07:19 PM
AkDrifted
Engine/Drivetrain/Suspension Parts for Sale
6
Aug 17, 2015 07:45 PM





