Fuel Pressure Regulator bad? - Land Rovers Only

wade · 05-17-2006, 06:10 PM

In trying to track down a problem, I've tested my fuel pressure regulator. With just the ignition on (without the vehicle started), my fuel pressure at the rail is 38 psi. I let it sit for five minutes and it didn't fall. After starting the engine, the fuel pressure rises to 48 psi and stays there at normal idle. If I rev the engine, it stays at 48 psi. If I pull the vacuum hose off of the fuel pressure regulator, no change...48 psi. Is my regulator bad? Thanks for any replies.

Disco Mike · 05-18-2006, 07:52 AM

Wade,
I don't think you have a problem. You would have a problem if the pressure dropped after sitting, that would indicate a bad back flow valve in the fuel pump assembly.
Otherwise I think you are fine.
Mike

05-17-2006, 06:10 PM	#1 (permalink)
wade Senior Member Join Date: May 2005 Posts: 131 Gallery: 0	Fuel Pressure Regulator bad? In trying to track down a problem, I've tested my fuel pressure regulator. With just the ignition on (without the vehicle started), my fuel pressure at the rail is 38 psi. I let it sit for five minutes and it didn't fall. After starting the engine, the fuel pressure rises to 48 psi and stays there at normal idle. If I rev the engine, it stays at 48 psi. If I pull the vacuum hose off of the fuel pressure regulator, no change...48 psi. Is my regulator bad? Thanks for any replies. __________________ Wade Location: Texas

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05-18-2006, 07:52 AM	#2 (permalink)
Disco Mike Moderator Join Date: Aug 2004 Location: Parker, Colorado Posts: 5,117 Gallery: 0	Wade, I don't think you have a problem. You would have a problem if the pressure dropped after sitting, that would indicate a bad back flow valve in the fuel pump assembly. Otherwise I think you are fine. Mike

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