im changing my fuel filter tomorrow, when i loosen it up and remove it is gas gonna come out or not? i wanna be prepared if im gonna have gas fallin in my face

 

Take off the negative battery cable, get a pair of saftey glasses. After the cable has been taken off there should be no pressure in the lines, but there will still be some gas in the line and filter. I would still get yourself a pair of saftey glasses cause theres always something that will get into your eyes while under your car.

 

I thought you needed to pull the fuel pump fuse and run it untill it died, to completely depresurize the line?

 

That's what I had always thought...I'd do that to double-check. If it runs and dies then you'll know for 100% sure that you've depressurized the system.

 

my dad said that too...so i figured ****it ill take it somewhere to have it done and if they mess it up then they fi it, i cant afford to break the car i have to drive everyday

 

Hmm it worked fine for me when I was just getting my motor running. And during my injector swap. I had the motor started and shut it down, took off the negative battery cable and took off the cap for the shrader valve and slightly pressed on the pin thingy to see if there was any pressure.

 

85...that sounds like a fuel system problem... If I remember the system right, it should hold fuel pressure for quite some time after shutting the car off...battery shouldn't have anything to do with it. Maybe your injectors were leaking causing pressure loss? Because without that fuel pump killed and the car burning off whatever fuel is in the lines and dying, the fuel pressure should remain there for, well, I assume at LEAST 12 hours or so...I'd figure more like a few days.

 

It only takes 1 hour or less for the fuel to bleed off to zero psi. Nope the injecotrs are fine "I flow matched them and checked for any leaking when I used a fuelinjector cleaning machine", I would be having one hell of a starting problem if it was leaking gas into the cylinders until there was no pressusre. When I was testing my fuel pressure with a gauge on the shrader valve everything was fine. I would start the pump up and the pressure would go up ot 40 psi, and when I shut it off it would stay steady. If so I wouldnt be getting 26.1 mpg. I have done this at least 10 times before with no porblems.
Either my car is freaky or somehting is wrong, cause I can remove my negative battery cable and the pressure will instantly drop off. I would assum that removing the fuse the pump shuts off and the line depressurizes its self automatically while the motor runs off of whats left in the lines.

 

Thing is..with the power cut..how is the fuel line going to depressurize itself that quickly without it, say, shooting out of the schrader valve or something? I dunno....maybe someone else can shed some light..that just seems strange to me though.

 

Shooting an idea, but when the fuel pump is under power it is pushing fuel. So when the power is taken away then the fuel should be able to go back thru the fuel pump, that is unless theres a one way valve somewhere.

 

I don't think you can mess it up, just make a big mess and smell like gas for a while.

 

I was under the impression that there was some sort of valve in the system to keep that from happening...

 

Hmm, I searched the site for anything pertaining to this and all I came up with was people just saying "put a rag around it and unscrew" didnt help me one bit.
Maybe Karl, or Tom knows something.

 

I just changed my fuel filter. I was worried at first, about the pressure and gobs of fuel coming out too.

But all i did is unplug the battery, but keep in mind that the battery hasnt been plugged back in for a few days.

Anyways, going under the car, with the tools, and a small bucket, and some PB Blaster to get those bolts loose, i was working at it.

Well the first bolt came out, the exit side of the fuel filter going towards the engine. No fuel came out. Then i began the other side, as soon as i loosened the bolt, i slowly started turning it, just waiting for the fuel to rush out.

Well the fuel did start coming out, but it wasnt pressured coming out, it just leaked out, which was good, and i easily caught it with the bucket.

So i got the filter out, put the new one in, and it was all done. When i started my car up again a few days later after i put in the SLP CAI and air foil, the car was rough and quickly died. I believe this was the fact that there was no fuel in the lines, and so it just died. But the second time i started it, the car turned on beautifully.

Mission Accomplished

 

Yeah if you have the car shut off for more than a few hours the fuel pressure will naturally bleed off. The way I did mine was right after having the car running and then took of the cable and there was no pressure but some gas was still in the line. I only had a small puddle of gas come out 6inch dia area of gas.

 

Perfectly normal for the car to die the first time. Probably not even from the fuel pressure....just from having the battery disconnected. When you start the car after the power is cut, I believe the IAC valve opens and closes so the computer knows which way is open and which is closed..it has to double-check.... Every single time I've had my battery disconnected, even if for only a few minutes, it stalls immediately after starting it and plumes black for a second from running extremely rich. Mission accomplished is right man...don't ya just feel GOOD now??! Probably like how I felt after I did my starter myself after being stranded 30 mins from home the day before. I started the car up, walked inside the house and proclaimed " I am victorious!"

 

feels good to accomplish anykind of project. You should have seen me when I finished painting my car LOL

 

Oh yeah..I can imagine! That little starter shindig made my day man. And the starter that I replaced myself worked WAY better than that rebuilt hunk of **** the shop I had it at before put in!

 

I hate rebuilt starters and alternators, you might as well buy a new one just to save yourself from having to do the job twice.

 

Yeah seriously.. Didnt know the difference between rebuilt and remanufactured before that. I got a DAP remanufactured one for like $70 w/ lifetime replacement.