twastheglow

I have some questions regarding the egr system. When I turbo'd my car last weekend, I simply hacked off the egr pipe that run to the stock exhaust manifold until I get my JGSTools egr pipe cap (which I've ordered, just haven't recieved yet). I've done the best job I can sealing that pipe up, but I'm pretty confident it still allows air in. I have 2 separate distinct questions...

1) What do the 4 vacuum lines that run a long the top of the stock radiator go to? I believe they have something to do with the egr system, but not sure. For the time being, I've plugged them. Is that an ok fix for now?

2) I've tried running my car and am having problems with the car REEKING of gas within seconds of starting it. After it idles for a couple seconds, it dies. After that it doesn't want to start, and if it does, it'll just die unless I keep my foot on the gas a little. I'm wondering if my egr pipe is pulling in fresh air instead of exhaust and the stock o2 sensor is reading that the car needs more fuel thus flooding the motor. My plugs foul out and I have no injector/fuel rail leak as I've tested that. I've tested my MAF, ecu, timing, everything's in check. The only thing that isn't is my egr which is going to be properly capped soon.

What do you guys think? Does the egr need vacuum to close? Since I've plugged the vacuum coming off of it, does it stay open, pulling fresh air in and asking for more fuel...which it doesn't need? I don't know what else to think.

And for reference, I have an EFI Specialist ecu tuned to my z32 MAF, and 550cc STi injectors.

Please help me out...I'm pulling my hair out here. I've been trying to figure out the problem for hours every night when I get out of work. I just want to drive the damn thing!
*mike*

s14unimog

what motor what chassis?

I think the first question's answer is the charcoal canister for the gas tank breather.

I think the second one has to do with your half ass EGR delete (no offense). I'm guessing that you are talking about KA-T b/c you say that you are turbo'ing your car.

This is what I did on my KA-T when I deleted that system.

removal of system and plugged vacuum lines on manifold.


made a block of plate, and left the small steal casting b/c I'm lazy and thats a bitch to get out.

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twastheglow

'93 S13 with KA24DE-T

Ok, so for the 1st question, is it ok that I have those sealed up?

No offense taken. lol I agree. I bought the egr cap from JGSTools to take care of that problem (for now). I just need to know if my "half ass egr delete" lol is causing my car to run SUPER rich and want to die instantly. I'm assuming between plugging those lines and using that egr cap, that will fix my idle issue and allow the car to run much smoother. However, I still don't know why my car fumagates the neighborhood with the smell of fuel when it idles...unless it has to do with the egr.

If the egr is supposed to be routing exhaust to mix with the intake air, and nothing but fresh air is mixing with the intake air, I would assume the car would run lean. Then when the stock o2 sensor reads that, it hits the ecu up for more fuel which in turn makes it run way too rich. Or am I way off?
*mike*

s14unimog

you want to trace those hoses back across the core support and see if they go to a hard line near the fuel filter, if so leave those open to atmosphere. DO NOT plug the breather for your gas tank. either way, trace all "unhooked" vacuum lines to their sources. If any go back to the manifold and are not hooked to anything you have leaks, so fix that anyways.

Saying there is a fuel smell is a little broad, my SR smells like fuel but thats b/c its straight pipe and tuned for more fuel.

can you identify where the smell is coming from. Is the car running rich or is there some sort of fuel leak/smell in the engine bay?

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twastheglow

Well, I have the 4 that come up from the throttle body plugged (that may not be correct to do), I have a giant one that hooked to the bottom of the stock air intake next to the radiator directly in front of the throttle body. That's wide open. I'm not sure what it is or where it goes. Where is the breather for the gas tank? I'll make sure to not have that plugged.

I can't identify for sure where the smell is coming from. It's just all over. If I had to guess I would say the engine itself. Like I said previously, the plugs are getting fouled out because too much fuel is being fed to the cylinders but I can't figure out why. That's why I had all those questions about the egr. I must be running SUPER rich, but my wideband reads very, very lean. On my UEGO it won't even give a digital readout. I have to check for exhaust leaks though.
*mike*

Om1kron

I don't have a turbo ka but I am throwing an code 85 which is the Evap purge canister control valve, and my car reeks of gasoline like I grabbed a cantine full of it and poured it under my car. It just emits pure gas vapor when idling and is running in open loop mode, it slightly did this when I first bought it but it has since gotten extremely worse.

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Wayne

twastheglow

Not to sound too noobish...but...what does that valve do? Where is it located? And did you fix your problem yet?
*mike*

twastheglow

I wonder if that's the problem I'm having. Then it just idles like shit because I haven't taken care of the egr yet. Maybe it's not running rich like I think. It just seems that way because it smells that way.
*mike*

Om1kron

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Wayne

twastheglow

^ But my car is an S13. Plus, mine smells from the motor area...not the gas tank.
*mike*

twastheglow

I read through some of those links you sent me. That shit just doesn't end!!! Isn't there a way to just block the egr without removing everything else and still have the engine run properly?
*mike*

twastheglow

From what I've read, that "evap purge canister" is the charcoal canister. Did I maybe not plug something that I was supposed to that went to that canister? Is that why I smell gas constantly? Anyone?
*mike*

twastheglow

Is there a hose that goes to a hard line next to the fuel filter? Is that the breather for my gas tank? Is there 1 or 2? That still leaves the other 3. Does anyone know where they go or what I should do with them?
*mike*

Om1kron

do you have an fsm for your car, I highly suggest downloading a pdf of it and highlighting all of those lines.

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Wayne

twastheglow

I do actually. But I'm not home so I was just trying to get some answers from some people on here who have actually worked first hand with these lines.
*mike*

Om1kron

yeah best bet is just to go through with the book and check any and everything, get it up on stands and find out where it's dumping all of this stuff or take it to a dealership and have them hook it up to a monitor. should be able to pinpoint why it's dumping fumes.

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Wayne

twastheglow

Well there should be a very limited number of places gas fumes could be coming from. I would assume it was something to do with the charcoal canister/evap purge canister. I'm just not familiar enough with things. The FSM that I have is on my computer and I don't remember seeing a diagram of all these parts intertwined with each other. Is there one in there? Or can anyone answer my question? Even with pics perhaps?
*mike*

twastheglow

I guess it boils down to this...

1) If I block off the egr pipe, what vacuum lines do I need to seal and with what lines do I need to keep open to the atmosphere? From what I understand so far, there is a vacuum line that goes to a hard line next to the fuel filter that needs to stay open because it's the gas tank breather. Correct so far?

2) What do I do with the 4 vacuum lines that come from underneath the throttle body (I believe 1 of them goes to a hardline mentioned in point #1, correct?)?

3) There is a very large hose that connects to the bottom of the plastic stock intake directly to the left of the radiator. What is it and what am supposed to do with it? Right now it's just wide open.

3) There are 2 lines that went into the charcoal canister. I have them both plugged (although not well). What do they go to and are they supposed to be sealed as well? If so, I'll re-plug those much better.

4) Is there a line I'm missing that should be plugged that gas fumes may be coming out of hence where the smell of gas is just pouring out of?

I really appreciate your guys's help. I just want to get my damn car back up and running. Watching her just sit there makes me sad inside and kills my soul. You guys are the key to me getting her rolling again.
*mike*

twastheglow

If you need anymore information or picstures or anything, let me know!
*mike*

iluvpandas4

for the gas problem, check out your fuel filter and the hoses connected to it. make sure the hoses aren't cracked and if you don't remember ever changing out your fuel filter, change it. my car had the same problem but a little less severe, i just changed out the fuel filter and everything was good. first day driving with the fuel filter sucked but after that no problems, a steady idle and no smell of gas. it could be a long shot but doesn't hurt to check.

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'92 240sx Coupe

twastheglow

Thanks for the reply. I'll definately check it out as I'm open to ANY suggestions. I did replace the fuel filter when I 1st bought the car in 2005, but who knows. I'll take a look tomorrow and see what kind of shape it's in.
*mike*

twastheglow

The only thing about that is I'm not actually leaking any fuel. There isn't a puddle of fluid under my car. Nor is there any dripping of anything either. But, like I said, I'll take a look nonetheless. Thanks.
*mike*

s14unimog

some times the leaks are so small that they evaporate before getting to the ground, make sure your fuel lines are not dry rotted.


Like I said, if you are unsure of what they do and they are connected to the manifold its better to have them plugged than open to atmosphere, b/c thats a boost leak.

Pics of these hoses would help.

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twastheglow

Someone mentioned that the gas smell is from the removal of the charcoal canister. Did I not do what I was supposed to with the lines going to it? What did you guys do? Is the charcoal canister a possibility?
*mike*

projectRDM

There's two vacuum lines to the manifold, those must be capped or the engine will have a vacuum leak. Remove and cap/plug.
The remaining line that runs across the firewall to the passenger frame rail is the fuel tank vent. Leave it open.

Done. You're making things complicated by over thinking it.

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twastheglow

You're right, I am making it more complicated. *takes a deep breath* I'm just having on going problems that I can't figure out and it's really frustrating me. Thanks for the info. I'm pretty sure I did all this already, but I'll check it again.
*mike*

twastheglow

If that wasn't done properly, would the engine bay reek of gas during idle?
*mike*

s14unimog

how could have not done it properly, do what Russ said. Cap the two going to the intake manifold and leave the other one to atmosphere

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d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson

twastheglow

The reason I say that is because I'm 99% sure I DID do it properly, but I have a gas smell that cannot be explained. So I was asking.
*mike*

Om1kron

www.ka-t.org :: View topic - Kirk build -IT RUNS!!!- DSM ecu, JGS mani, T3/T4, etc.

scrooooooll down...

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Wayne