Releasing the Fuel Pressure?

[bruker]

I'm going to be changing my fuel filter soon and was wondering what's the best way to release the fuel pressure. On other vehicles I would disconnect the enertia switch and crank the engine for a while or pull the fuel pump switch and run it 'till it dies. Is there a better way?

 

[adsm08]

Well, the book says to release it by the test port on the rail. I usually just pull the rear line off slowly. You will hear it hiss out like a shaken soda bottle before it sprays if you are careful.

 

[feellnfroggy]

Theres a valve on the fuel rail on top of the motor looks like a tire valve, press it andit will release the fuel pressure, as well as squirting a little fuel so watch your eyes, just keep key off. Swap the filter hten turn it on like usual.

 

[joeranger85]

I think its called a schrader valve...the one as mentioned on the fuel rail...its towards the back of the intake manifold.....

 

[Dweano]

For the record I did what you mentioned in the first post and it work just fine for me. Didn't know about the valve on the fuel rail!

 

[adsm08]

For the record I did what you mentioned in the first post and it work just fine for me. Didn't know about the valve on the fuel rail!

I do them on the clock, and anymore the valves are hidden so good that it's easier to just look away as I pull the line and try not to get sprayed in the face.

 

[zukirider21]

alright its easy ive done it on a few friends cars before... you're gonna need a torch, bomb shelter, and multiple fire extinguishers. you may get better results with a fire squad on hand.

just kidding, lol. use the schrader valve on the fuel rail as previously stated.

 

[BRUTUS_T_HOG]

I'm going to be changing my fuel filter soon and was wondering what's the best way to release the fuel pressure. On other vehicles I would disconnect the enertia switch and crank the engine for a while or pull the fuel pump switch and run it 'till it dies. Is there a better way?

its very easy to remove the fuel pump relay or fuse and crank the engine.

 

[TheTopher]

its very easy to remove the fuel pump relay or fuse and crank the engine.

+1 That's how I usually do it. The shrader valve does sound a little bit easier though.

 

[heptofite]

if you smack the inertia switch with the blunt end of a screwdriver, crank the engine, and push your foot down on the gas pedal, it'll dump the pressure pretty quick

 

[BRUTUS_T_HOG]

+1 That's how I usually do it. The shrader valve does sound a little bit easier though.

its just as easy if its easy to access, but i don't like the way it sprays out

 

[lil_Blue_Ford]

I tried pulling the fuse/tripping the inertia switch/pulling the pump relay and cranking the motor before a couple times an gave it up because my truck would always start and run for 5-10 minutes, towards the end running really rough. I guess it started siphoning fuel cuz it was always almost as bad as not doing anything.

From then on I've done one of two things:

Take a long handled small flat screwdriver (Craftsman of course), position it on the shrader valve on the fuel rail, and wrap a shop rag around it. Press an hold for a bit until you're fairly certain the pressure is gone.

Or get the fuel lines released but not fully off, wrap a rag around the connection an pull it apart.



The key is that you want to avoid getting gasoline on you as much as possible, the stuff isn't good to get on your skin.

 

[gw33gp]

I just pull the fuel pump fuse and start the engine. As soon as the engine starts running rough I turn it off. That indicates the pressure is low and will not spew out gasoline when you disconnect the fuel line from the filter. Be prepared, fuel will still run out but will not spray all over you.

I always wait until the gas tank is low on fuel and park with the truck on an incline, with the front up, (parking brake on, in gear and tires blocked) so the gasoline doesn't continue to run out of the tank after disconnecting the fuel line.

 

[feellnfroggy]

I do them on the clock, and anymore the valves are hidden so good that it's easier to just look away as I pull the line and try not to get sprayed in the face.

Ive done this twice and twice got fuel in hte face. Once got it in my eye, ear and mouth/nose. Had to go to the ER, which happily was across the street from the auto parts store cuz had to drive myself. Talk about some internal pain, let your eardrum contact gasoline.

 

[BRUTUS_T_HOG]

i just wanted to add this..

unscrew the gas cap to relieve and pressure left. all the times i have forgotten to do this i've gotten fuel spraying out of the lines when i unhook them