Fuel pressure
#1
Racer
Thread Starter
Fuel pressure
Is the fuel system on my ls2 pressurized after the engine is shut down? If so does it eventually bleed down? I want to change the rails and don'want fuel spraying all over.
Thanks
OneKick
Thanks
OneKick
#3
Le Mans Master
There should be a schrader valve on the drivers side fuel rail to release the pressure.
Also, there's a reverse flow check valve in the fuel pump assembly that's supposed to help maintain line pressure. However I've seen the line bleed down just after a short amount of time on an older pump assemblies. Fortunately when you press the ignition button the pump should immediately repressurize the line prior to crank if needed.
Also, there's a reverse flow check valve in the fuel pump assembly that's supposed to help maintain line pressure. However I've seen the line bleed down just after a short amount of time on an older pump assemblies. Fortunately when you press the ignition button the pump should immediately repressurize the line prior to crank if needed.
#4
Racer
Thread Starter
Thanks, thats the info I needed. If I open the Schrader valve and the system is still pressurized will there be a lot of fuel spray, will a rag held in front of it be adequate to handle the spray.
OneKick
OneKick
#5
Le Mans Master
I usually just place a folded rag under the end of the fuel rail and unscrew/remove the valve stem. Fuel will just trickle out rather than spray.
#7
Race Director
There is so little pressure left after the car sits overnight that you can put a rag under the valve and catch what little fuel comes out. Very little fuel and very low pressure.