Fuel pressure
Thread Starter
Racer
Joined: Mar 2012
Posts: 420
Likes: 9
From: Bow New Hampshire
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
Race Director
Joined: Dec 2005
Posts: 11,888
Likes: 107
From: God's Country, ID
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.
Thread Starter
Racer
Joined: Mar 2012
Posts: 420
Likes: 9
From: Bow New Hampshire
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
Race Director
Joined: Dec 2005
Posts: 11,888
Likes: 107
From: God's Country, ID
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.
