fuel system ?

[Poboy69]

I am completely re doing the fuel system on my MK3 in prep for a big single 2JZ. Question is do i need to keep the MK3 fuel tank breather line which runs from the tank to I believe the charcoal canister(which does not exist anymore), or can i plug this line off and simply get a vented gas cap?? and if i need to keep it, what do i plug it into since there will not be any emissions on the car.

Thanks,
Tom W

 

[mk3-4-me]

i just took it out. Plugged the vacuum line that goes to the top of the throttled body up. I just left the hose that ran to the cannister alone, ddnt block it or anything. Idk if thats right or wrong but it hasnt affected the car in any way i can see.

 

[Poboy69]

i just took it out. Plugged the vacuum line that goes to the top of the throttled body up. I just left the hose that ran to the cannister alone, ddnt block it or anything. Idk if thats right or wrong but it hasnt affected the car in any way i can see.

So you removed the hard line that runs from the tank to the charcoal canister or left it alone?

 

[Poodles]

The charcoal canister isn't there just for emissions...

 

[IBoughtASupra]

Charcoal canister is there to absorb gas fumes. Heat and gas fumes don't mix.....

 

[JStoked]

The charcoal canister isn't there just for emissions...

What else does it do? i am planing on elemenating mine to and i plan getting a fuel cap that breathes. is that ok?

 

[Smartparts]

I think it would be in your best interest to block off the hose running from the canister, gas fumes under the hood might not be the safest thing

 

[Poboy69]

I'm trying to eliminate the line running from the tank, my canister went in the trash long ago. I should mention that the car is being built now and not running. I'm just trying to simplify things, but not at the expense of endangering myself, so if there is no way around the line I'll throw the can back in.

 

[Poodles]

The way around it is to use a smaller one from a JZA70 (or another car). There a tons of threads on this, but I'll be nice.

- Captures dangerous gas vapors and reroutes them safely back into the engine.
- Has a 2 PSI check valve that keeps 2 PSI of pressure in the gas tank. This does 2 things. First it stops the fuel pump from cavitating. Second it keeps the tune stable.

I imagine you're removing EGR as well, might want to search on why that's a bad idea as well...

 

[Poboy69]

Thanks for the tip! I wasn't aware the Aristo 2jz came with an egr valve, may have missed something there.

 

[Poodles]

You never said where the 2JZ came from...

 

[IBoughtASupra]

USDM 2JZ have EGR and JDM 2JZs don't have EGR.

OP, joke is on you, don't try to be a smartass since it does not help anyone.

 

[OfnaRcR4]

OP, joke is on you, don't try to be a smartass since it does not help anyone.

Sorry to be a smartass but I'm missing thr part where he was?

 

[IBoughtASupra]

Post ten, sarcasm when your the one asking for help is a :nono.

 

[arknotts]

Post ten, sarcasm when your the one asking for help is a :nono.

Didn't sound sarcastic to me. :dunno:

Sheesh, seems like these EGR/CC threads always turn contentious without fail nowadays. It's understandable if the OP were not listening to sound advice (yes I agree, there are a lot of the past threads like this...), but I don't get that impression here.

Poboy, I tend to agree with Poodles and IBoughtASupra to a degree. At a minimum make sure you are not venting fumes into the engine bay. If you do remove the CC, at least reroute the fuel tank vent line somewhere safe away from heat and any possibility of a spark. I have mine vented out the back right of the car, above the fuel tank and away from the exhaust. Though not as important (for safety), I also run a ~2-3 PSI check valve on this line to keep some pressure in the tank like stock.

That said, it really doesn't simplify things too much. It's a simple system as-is. I just have a FFIM without a ported vacuum source to run it off of, which is why mine is no longer there.

 

[Heavy D]

i have no egr, and no CC and its not even capped off, and i race mine on the usual Saturday nights. open elbow, and 2 stepping and nothing, not even on 90 degree days where its super hot, but ima take your guys words, and reroute the line some where else

 

[Poboy69]

Didn't sound sarcastic to me. :dunno:

Sheesh, seems like these EGR/CC threads always turn contentious without fail nowadays. It's understandable if the OP were not listening to sound advice (yes I agree, there are a lot of the past threads like this...), but I don't get that impression here.

Poboy, I tend to agree with Poodles and IBoughtASupra to a degree. At a minimum make sure you are not venting fumes into the engine bay. If you do remove the CC, at least reroute the fuel tank vent line somewhere safe away from heat and any possibility of a spark. I have mine vented out the back right of the car, above the fuel tank and away from the exhaust. Though not as important (for safety), I also run a ~2-3 PSI check valve on this line to keep some pressure in the tank like stock.

That said, it really doesn't simplify things too much. It's a simple system as-is. I just have a FFIM without a ported vacuum source to run it off of, which is why mine is no longer there.

Thanks, oddly enough I could not find info on this until I searched for vented gas cap, then everything came to light, unfortunately after I had already started this thread:nono:

arknotts, I will certainly research the check valve for more info. While we are on the topic though, does the check valve need to be hooked up to anything else besides the tank vent line?