so i have had some issues with my car and i think i got it all figured out. when i replaced my fuel pump i saw that it sits on almost a shelf type thing that is not at the bottom of the tank. so how does the system work in a ek?

oh yea and i have already googled it and searched all threads.

 

how does it work?
It holds fuel, roughly 9 gallons in a civic. It is piped into the car by a pipe namely called the filler neck. The fuel tank is sealed and has 2 straps holding it in place. The fuel pump sits inside and pumps fuel forward towards the fuel injection system so the engine can combust it, and make power to move the wheels, power the a/c etc etc.

 

Ummm, fuel tank holds fuel and the pump pumps it under pressure to the engine, pretty simple system! I'm suprised you replaced your own pump...

 

thanks. but yea i man i know what it does but i though it was more complex then that. when i replaced my pump like i said there is like a bowl or shelf it sits on. how does that stay filled filled with gass all the time?

i though it was just a big open tank and the pump sits at the bottom and bumps gass to the motor but i dont think it is like that

 

USDM 6G Civics hold 11.9 gallons (except the GX).

 

There are things called "baffles" sitting in your tank (well most cars anyhow) these prevent the gas from sloshing around. Typically the sock sits in the lowest point in the tank,and you pull fuel from that sock filter and through a series of gas lines into the fuel filter under the hood to where it is atomized by the injectors, running on a pulsed interval dictated by the ECU.

 

The pump pick-up sits in a baffled sump area of the tank where the liquid fuel collects, even when the tank capacity is low.


Just out of curiosity, why do you want to know about this?

 

Also the 92-95 civics have a fuel return line so that when the system reaches said pressure as set by the pressure regulator, fuel is routed back to the tank from the fuel rail. This keeps the pump cooler as it runs most all the time the engine is on and running. Not sure about Honda, but around the 2000 model year, most cars had switched over to a non-return fuel pump system. When the pump hit system pressure, the access fuel was just dumped back into the tank as allowed by the regulator. As others have stated, the pump pick up sock should sit in the baffled area of the tank as to keep fuel from leaving the pick up during hard cornering. Usually that is slightly toward the rear of the tank access hole. This usually requires a bit of twisting while working the unit in or out of the tank. This is my understanding of how things work and others here can correct this if in error.

 

Ive never gotten anymore then 9 gallons in my civic....

then again, I never ever let it get below 1/4 of a tank, so 11 gallons I guess makes sense.

 

some EGs were said to have 11.9 gal tanks as well, my 94 ex holds 11.9

i cant remember which but my brochure says the ex/si holds 11.9, and the cx, vx, dx all hold 9

 

thanks to everyone for the respond. and yea i wanted to know because well my pump went bad and i had some bag gass so i drained my tank 100% dry with the drain plug....not a good idea lol. then i filled the car up with about 3 gallons that i got with my dad in his truck just in a little gas can. i figured this would be enough for me to get 2 miles up the street to the gas station but i was wrong. as soon as i went around a corner my car died on me and would not start. i was getting spark and air but no gas. so i came to the conclusion that the baffled or what ever it just never got filled up with gass and when i went around the corner it spilled out. i got a full tank of gas and for the last 2 days it has been driving fine. so i just wanted to see if i came to a logical conclusion. thanks again for the help

 

Well, this is a total guess, I've never really worked on my fuel system, but from what everyone else said, maybe the "sock" at the bottom of your tank hadn't had time to soak up enough fuel, perhaps after running totally dry you have to let the fuel sit for a few minutes or maybe fill it up so it can pressurize? I'm curious too now...

 

thats weird cause i maxed out my civic everytime around 9 gallons 9.5 maybe

 

yea this sounds like a good theory too. since i got a 100% filled i have had no problem. so i think you might be right. and like i said i did just put in the new pump and 2 days after i had it i pulled it out and come to think of it the "sock" was pretty dry. you gave me some good thoughts lol thanks man