School me on evap and venting
School me on evap and venting School me on evap and venting (1998 LS car)
On longer cruises to neighboring towns, my car will start to lose power and almost immediately die. After some troubleshooting it was determined that with the gas cap off or loose, the issue completely stops. Which created the fun issue of gas down the side of the car and bumper, lol. I determined it is vapor locking due to the creation of pressure, or the creation of a vacuum... not sure which.
Anyway... I'm currently running my return into the old evap line and evap is no longer installed. (Aftermarket rails and dual feed) Now I think the evap could be the issue but I'm not sure. The charcoal cannister hasn't been touched. I know the fuel hat has a vent line or something as well.
I know 98 cars are different than others but probably have the same principle. Feed, return, evap, vent.
Any pointers to get this resolved? Loosening the gas cap is not the answer. Lol
On longer cruises to neighboring towns, my car will start to lose power and almost immediately die. After some troubleshooting it was determined that with the gas cap off or loose, the issue completely stops. Which created the fun issue of gas down the side of the car and bumper, lol. I determined it is vapor locking due to the creation of pressure, or the creation of a vacuum... not sure which.
Anyway... I'm currently running my return into the old evap line and evap is no longer installed. (Aftermarket rails and dual feed) Now I think the evap could be the issue but I'm not sure. The charcoal cannister hasn't been touched. I know the fuel hat has a vent line or something as well.
I know 98 cars are different than others but probably have the same principle. Feed, return, evap, vent.
Any pointers to get this resolved? Loosening the gas cap is not the answer. Lol
Why did you run the Return to the EVAP line instead of the factory Return line?
You are literally filling that whole Charcoal Canister with gas...it's more than that black Vent Solenoid on the Intake.
You are literally filling that whole Charcoal Canister with gas...it's more than that black Vent Solenoid on the Intake.
No, its not. It's on the line to the tank, not to the canister. Long story short, it was a quick and easy way to add a larger return with adjustable regulator to stock fuel rails.
The Vent has a one way valve on the end of it, it only allows outside air to come in for the EVAP to pull the extra fumes and pressure out of the tank. It doesn't allow any fumes or pressure to go out of the tank. That's most likely what you're problem is.
Yes over the last day I've gathered this much. I haven't found a solution yet that I'm excited about. Either a vented cap or a filter on the end of a line.
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Verdad Gallardo Or enlighten me on my thoughts. I am full rookie with this stuff.
This was a solution I thought of immediately. But, the 98 gas caps aren't screw in. They have a spring like loaded design with slots on the sides. I'm thinking if you drill that out, you could damage the internals and it may not lock into place after.
I'm just thinking along the lines of how the factory setup was. It had Air/fumes coming in via egr and air/fumes going out via the vent. Unless I'm wrong you have to have both or you can create a pressure OR vacuum inside the tank. Neither of which are great.
Or enlighten me on my thoughts. I am full rookie with this stuff.
Or enlighten me on my thoughts. I am full rookie with this stuff.
EVAP pulls pressure out of the Tank using the Engine vacuum when it's running.
Find the Tank Vent line, pull the one way Valve off the end and put on a little filter of sorts, and you'll be fine.
Definitely wrong, I explained how it worked in a post above. EGR is totally unrelated to the EVAP system.
EVAP pulls pressure out of the Tank using the Engine vacuum when it's running.
Find the Tank Vent line, pull the one way Valve off the end and put on a little filter of sorts, and you'll be fine.
EVAP pulls pressure out of the Tank using the Engine vacuum when it's running.
Find the Tank Vent line, pull the one way Valve off the end and put on a little filter of sorts, and you'll be fine.
I guess I assumed that air needed to go both in and out.
I ended up lifting up the fuel hat and yanking the return line off the stock return line and now it will be a vent also.
if it doesn't work I'll add a filter to the vent line.
No, you don't.
I told you how to do that. Some of us have built a few cars on this forum if you were unaware of that...
So why are you posting in here asking for someone to "school you" on stuff when you don't listen to one ******* word we tell you and do your own bullshit. You're that person.
Leave.
I told you how to do that. Some of us have built a few cars on this forum if you were unaware of that...
Leave.
No, you don't.
I told you how to do that. Some of us have built a few cars on this forum if you were unaware of that...
So why are you posting in here asking for someone to "school you" on stuff when you don't listen to one ******* word we tell you and do your own bullshit. You're that person.
Leave.
I told you how to do that. Some of us have built a few cars on this forum if you were unaware of that...
So why are you posting in here asking for someone to "school you" on stuff when you don't listen to one ******* word we tell you and do your own bullshit. You're that person.
Leave.
What i did wasn't "bs" it was literally switching the old return line over to make a new evap line, and was less of a hack job than your idea of just throwing a filter on it.
I've been on ls1tech since 2010. Not going anywhere, pal.
Last edited by Tyler Dietzenbach; Aug 13, 2024 at 06:35 AM.
15 years to build one car? Outstanding....
Can't call me a hack when you literally moved lines around on the Fuel System you know nothing of, and had problems wondering why they happened, clown.
You asked questions, got correct answers, and came back telling me I was wrong about something you don't know. That happened. Absolutely genius.
I'll let you get back to your one car, you need a couple more years to learn that Fuel system to make it right. Have a good one bud.
Can't call me a hack when you literally moved lines around on the Fuel System you know nothing of, and had problems wondering why they happened, clown.
You asked questions, got correct answers, and came back telling me I was wrong about something you don't know. That happened. Absolutely genius.
I'll let you get back to your one car, you need a couple more years to learn that Fuel system to make it right. Have a good one bud.
15 years to build one car? Outstanding....
Can't call me a hack when you literally moved lines around on the Fuel System you know nothing of, and had problems wondering why they happened, clown.
You asked questions, got correct answers, and came back telling me I was wrong about something you don't know. That happened. Absolutely genius.
I'll let you get back to your one car, you need a couple more years to learn that Fuel system to make it right. Have a good one bud.
Can't call me a hack when you literally moved lines around on the Fuel System you know nothing of, and had problems wondering why they happened, clown.
You asked questions, got correct answers, and came back telling me I was wrong about something you don't know. That happened. Absolutely genius.
I'll let you get back to your one car, you need a couple more years to learn that Fuel system to make it right. Have a good one bud.
Never said you were wrong about anything. A return was added in a pinch with the fittings on hand at the time which lead to mentioned issues. Learning from what you said simply had me switch lines in the tank and reconnect without issue. It's better to have it work as intended as opposed to a hack job with a filter. My car is built well and is super clean. It will stay that way.
It has more than enough fuel to support over 1000rwhp.No concerns on fuel here.
Come grudge race it anytime.