80 psi?

Reply Subscribe

Thread Tools

Search this Thread

Mar 22, 2012 | 04:03 AM

Jesus Freak

Thread Starter

Launching!

Joined: Feb 2011

Posts: 203

Likes: 0

From: Salem, OR

80 psi?

I've got a Walbro #dumF20000169 and Corvette FPR napa part #3737 installed on my LS3 480. I hooked a FAST fuel pressure gauge up to the rail and it says I have a CONSTANT 80 psi at idle. Is this normal? Is it ok? Is it a bad regulator? What should I test?

Mar 22, 2012 | 07:50 AM

Old Geezer

TECH Senior Member

iTrader: (3)

Joined: Jun 2004

Posts: 5,639

Likes: 71

From: GA, USA

NOT normal. Should be in the hi 50's range.
Check to see if you have issues with the return line off of the filter.

Mar 22, 2012 | 09:15 PM

Jesus Freak

Thread Starter

Launching!

Joined: Feb 2011

Posts: 203

Likes: 0

From: Salem, OR

Pulled the return line off the regulator and it was flowing great. Pulled the sender that houses the return line (saddle bag tank) and fuel was flowing in there really good. Replaced the FPR and still have 80 psi. Pump is getting 13.5v at idle. Any other ideas?

Mar 27, 2012 | 06:28 PM

stevieturbo

9 Second Club

Joined: Nov 2003

Posts: 13,616

Likes: 185

From: Norn Iron

Confirm your gauge is accurate.

Mar 31, 2012 | 09:50 PM

Stoney667

Staging Lane

iTrader: (3)

Joined: Dec 2011

Posts: 83

Likes: 0

From: Delaware, Oh

I'm having the exact same issue right now. What did you find out?

Mar 31, 2012 | 10:24 PM

Jesus Freak

Thread Starter

Launching!

Joined: Feb 2011

Posts: 203

Likes: 0

From: Salem, OR

Haven't messed with it. All my lines are strong enough to handle the pressure, so I just left it. I haven't double checked my gauge tho.

Jul 1, 2012 | 10:48 PM

fastime

Teching In

Joined: Jul 2010

Posts: 1

Likes: 0

From: GTA, Ontario, Canada

I have the same problem ... Its because I have 2 regulators now ,, the one in the tank and the corvette filter .. I am currently trying to find a non regulated fuel filter that will snap into the same fittings ...