You’re correct, sometimes thing get unraveled from whom you least expected. I will keep trying to solve this issue with in an open minded way.
Thanks
Fuel 19lbs EV6 fuel injectors, what fuel pressure???
- Thread starter PonyGTrider
- Start date
Thanks
Yeah I’ve been thinking about injectors upgrade to at least 24lbs, and no doubt tuning would narrow me to the best and optimum performance.
Unfortunately I’m too late for a Moates Quarterhorse, unless I put my hands on a used good condition unit somehow.
Thanks for the ideas
I believe there is one other way. The return line is totally [saturated]. You could very well be returning more fuel to the tank than the OEM return lines are happy with.
Thoughts?
I had a 255lph Walbro with 42 lb/hr injectors on stock fuel lines and had no issues with a soaked charcoal can. I would be curious to know if all the lines back to the tank (suppy, return, and vent) are all in good shape and not plugged. Would also be curious if the vent valve on the tank is working properly. The other thing is if the pump could not return enough fuel to the tank I would think the pressure gauge would go up.
Are you over filling the tank?
the filler neck is higher than the tank vent, if you over fill it it's gonna get sucked into the canister, blow air through the vent tube line from back to front, there's a check valve so only one way
the filler neck is higher than the tank vent, if you over fill it it's gonna get sucked into the canister, blow air through the vent tube line from back to front, there's a check valve so only one way
I removed and tested the purge solenoid valve and it is working fine. I checked it’s wiring an I had 12 V when ignition on, the ground wire is switched by the computer. But since the activation of the purge valve happens while cruising I will run a test light from the purge valve to inside of the cab this will determine if the valve is getting energized by the computer.
Thanks man
No that know off.
Could you elaborate a little about that check valve? Where is it the located?
Thanks man
Check valve is on top of the tank, one way valve, lets vapor out through the charcoal canister when filling the tank and relieves pressure at high temps, and when the solenoid is activated pulls the vapors from the canister, all this stuff is at or below the level of the tank....'cept the filler neck, you don't want to fill all the way up the neck, pressure pushes vapor AND liquid into the vent line eventually soaking the canister.
This is all theory of coarse, I never got any farther than 'shade tree' mechanics.
This is all theory of coarse, I never got any farther than 'shade tree' mechanics.
Ok I understand the concept, so that means my check valve is trashed? My understanding is that the valve is a one way (out) valve but I can blow inside the tank and the fumes go out too so I don’t think there’s a check valve and if it is there then it is broken. Is my assumption right?
I think we're talking two different things here. First of all I did a little research and found that the tank breathing valve allows first the relieve (Exhale) vapors caused by motion and heat but also it is a breathing valve (Inhale) air as the fuel tank gets empty to avoid implotion. so I don't know if it is a one way valve.
Now when we talk about the fuel lines there are three of the. The feed line, the return line and the relief line. The feed and return lines are always saturated. The relief valve just carries fumes unless the fuel tank is over-filled. Not 100% sure but that's my understanding.
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No.if you're over filling the tank.
blow air into the tank, air comes out vent tube, all is good
blow air into vent tube, air enters tank, may not be so good.
Don't use compressed air, it will over power the hoses and the valve,
Now there's members here that are real mechanics that may have better advice.
I have 190 lph pump with 19lbs injectors. I checked the integrity of all the lines. No clogs, no leaks and all of them are doing their job.
I was just reading an article related to this concept and now I'm not sure what is a fact.
"I did a little research and found that the tank breathing valve allows first the relieve (Exhale) vapors caused by motion and heat but also it is a breathing valve (Inhale) air as the fuel tank gets empty to avoid implotion" So is it a one way or a bypass valve??? I'm confused
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Damn, I hate too much info, causes over thinking, confusion.
Just stick a hose in the filler neck, seal it off with a rag, blow air into tank, if you can feel air coming out the vent tube at the canister you're good.
Post the results.
Just stick a hose in the filler neck, seal it off with a rag, blow air into tank, if you can feel air coming out the vent tube at the canister you're good.
Post the results.
Yep thats it, I know if I blow the vent hose and goes into the tank, all I need to know is if air comes out oe the vent line blowing thru the filling tube, Thanks
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My understanding is the gas cap allows air into the tank and the vent on the top of the tank is in fact a one way valve.
Negative, that’s the whole purpose of the EPA (I think that’s what is called) regulation of a sealed gas cap so no raw gas pollutes the air. That is tested at the anti-smog verification stations.
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