Fuel vapor purge delete
04-04-2005, 01:13 PM
#16
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I'm just gonna drag this one from it's cosy hiding place!
I was looking at doing this myself today. I think I'm happy with a vent in place of the charcoal canister to let the tank breathe, and was just going to plug the "other end" of the system (depending on how easy it is to get to the pipe from engine bay to tank, I may get rid of as much as possible), but what about the vacuum system?
As I see it, there's a line from J-boot to throttle body via the purge system and thermoswitch. Should I just connect these two, and leave the thermoswitch totally unplugged? Then there's the line from the intake to the purge system. This should just be deleted, right?
Thanks
I was looking at doing this myself today. I think I'm happy with a vent in place of the charcoal canister to let the tank breathe, and was just going to plug the "other end" of the system (depending on how easy it is to get to the pipe from engine bay to tank, I may get rid of as much as possible), but what about the vacuum system?
As I see it, there's a line from J-boot to throttle body via the purge system and thermoswitch. Should I just connect these two, and leave the thermoswitch totally unplugged? Then there's the line from the intake to the purge system. This should just be deleted, right?
Thanks
04-04-2005, 09:03 PM
#24
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Hey;
If you need to pass emissions, you better leave it there. The guys that do the testing have listings of what is supposed to be there. They can find out if they take the time to look, or if they know the cars at all. There is no particlular gain to removing it, unless it has failed and is gassing you out.
The only reason to remove one is if your cannister is satiated. They will not absorb forever. It is a nice system because when it is working right there are no fumes. If you remove it, you WILL have fumes escaping to the atmosphere, wherever that may be.
I have had the entire fuel system apart on my track car, and the venting system is EXCEEDINGLY complex. The entire system lock stock and barrel probably doesn't weigh 20 pounds.
If you need to pass emissions, you better leave it there. The guys that do the testing have listings of what is supposed to be there. They can find out if they take the time to look, or if they know the cars at all. There is no particlular gain to removing it, unless it has failed and is gassing you out.
The only reason to remove one is if your cannister is satiated. They will not absorb forever. It is a nice system because when it is working right there are no fumes. If you remove it, you WILL have fumes escaping to the atmosphere, wherever that may be.
I have had the entire fuel system apart on my track car, and the venting system is EXCEEDINGLY complex. The entire system lock stock and barrel probably doesn't weigh 20 pounds.
04-05-2005, 09:14 AM
#26
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I suppose if it doesn't vent, then there's no problem with dumping the vacuum controlled bit, and just connecting the two hoses via the canister then? I just wanna simplify the vacuum system (then I could get down to one hose coming off my MAF too!)
04-05-2005, 02:17 PM
#28
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Originally Posted by danny951
so... what's the trick on keeping the stock system, but eliminating the fumes coming through the air vents?
You run the line back to the tank, cut it there and put on a filter so it vent to the ATM in the back of the car.