While engine is running remove the fuel pump fuse. Engine will run out of fuel when pressure drops.
there is always fuel pressure even the car is on or not, u will need to release fuel pressure before doing any thing in the fuel line
start the truck then while it running pull the fuse for the fuel pump and allow the truck to die then fuel line have no pressure
fuel pressure release valve ? Just disconnect wire harness from tank or remove fuse to fuel pump then start and run engine until it runs out of fuel in line then continue to try to start for 20 seconds then disconect battery and service pump or injectors as the fuel system is now empty of fuel and pressure.
Remove the gas cap. If you do not hear the pressure release, then press the shrader valve located on the fuel rail.
you open the gas cap to release any charge from the line
Remove the gas cap, then look for a Schrader valve on the fuel rail. If it has one release the pressure there. If it has none, then wrap a rag around the fuel filter coupling and prepare for a spray of fuel when you disconnect the fuel line from the fuel filter.
There isn't too much pressure. You can just remove the line slow if you like and a little fuel will leak out. Another option is to remove the fuel pump fuse/or relay and try to start the car. It may start but soon will stop. There should be no pressure in the line then.
there is a valve, kinda like tire air valve, with a green cap on it to the drivers side of the intake near the throttle that you can open and depress to release in line fuel pressure !
The fuel pressure regulator controls fuel pressure at the fuel injectors. It uses vacuum pressure to control the pressure. It is positioned on the end of the fuel rail. If they leak, fuel will go into vacuum line causing hesitation on start-up and the smell of gas at exhaust. Warning, Fuel is under pressure. Disconnect battery and release pressure before replacement.
Goto the Fuel rail under the hood. it sits on the passenger side of the engine. It will have a black cap on it. NOT the A/c line. it's on the Fuel line. remove the cap and it looks like a tire value stem. Push it in and the pressure will be released.
Pull the fuel pump fuse and run the engine until it dies from fuel starvation.
Crank the engine without pressing accelerator.