Fuel Pressure Question
Thread Starter
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Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
Fuel Pressure Question
My fuel pressure gauge always reads about 58 psi, even when the truck is off, at all speeds. Is this right or should it bleed down after not running for several days ? TIA - Bill
Cargo Master
Joined: May 2010
Posts: 3,047
Likes: 10
From: Snohomish, WA
It should bleed down. When you turn the key off, your gauge will not register though. Mine bleeds pressure in about 30 seconds after shut down. If your key is on, it will hold pressure until the pump shuts off.
You may have a slightly stuck FPR.
What gauge are you using?
You may have a slightly stuck FPR.
What gauge are you using?
Thread Starter
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Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
It should bleed down. When you turn the key off, your gauge will not register though. Mine bleeds pressure in about 30 seconds after shut down. If your key is on, it will hold pressure until the pump shuts off.
You may have a slightly stuck FPR.
What gauge are you using?
You may have a slightly stuck FPR.
What gauge are you using?
- Brad - Truck runs good, no problems
Posting Guru
Joined: Dec 2007
Posts: 2,290
Likes: 2
From: SEMO
Yes the FRX will help! It will replace the the factory fuel pressure regulator.You will see a higher pressure setting.IIRC Clay has it set at 65psi on the FRX.
Thread Starter
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Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
Good deal - Thanks Brad - Ive got a pretty good days work coming up - Clay sent me new cac boots, frx, and ebpv delete & new o-rings for turbo. My first time pulling the turbo so should prove a learning experience. Any tips from the pro's much appreciated.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
I'd turn the key on and let it sit for 60 seconds. The fuel pump will cycle off in about 20 seconds and the remaining time should let pressure bleed off if it's going to. Then open the drain valve on the fuel bowl and see if it sprays out like it's at 58 psi or see if the pressure will drop on the gauge. You might have a faulty gauge.
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Posting Guru
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my EV2 will show pressure after i shut the truck down...wait a little while and when you turn the key on it should drop to 0 and pick back up..all my ev2's will hold last position when cut off and then drop when the key is turned on
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Thread Starter
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Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
I was afraid it might be gauge or something cause I can go out after truck sits for 5 or 6 days & without even putting the key in the ignition it is still at 58 psi. When I start it or get on it there is no change at all.
Cargo Master
Joined: May 2010
Posts: 3,047
Likes: 10
From: Snohomish, WA
Where is your sender mounted? Also does the pressure change if you drive? WOT runs should show a pressure drop for a few seconds. It may only 5-8 psi, but it should move the gauge some. If not, I would look at the idea the sender is faulty. More common than the gauge going bad.
Thread Starter
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Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
I'd turn the key on and let it sit for 60 seconds. The fuel pump will cycle off in about 20 seconds and the remaining time should let pressure bleed off if it's going to. Then open the drain valve on the fuel bowl and see if it sprays out like it's at 58 psi or see if the pressure will drop on the gauge. You might have a faulty gauge.
Where is your sender mounted? Also does the pressure change if you drive? WOT runs should show a pressure drop for a few seconds. It may only 5-8 psi, but it should move the gauge some. If not, I would look at the idea the sender is faulty. More common than the gauge going bad.
Thread Starter
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Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
Brad - Gonna wait till this weather breaks cause I work out under the carport - Hopefully next week- they are saying high in the 80's. Regular old cold front compared to the last couple weeks, eh ?