Fuel Pressure
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Senior User
Joined: May 2005
Posts: 247
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From: Ethridge, TN
Fuel Pressure
Hi guys. Working on my son's 1997 F250 7.3 diesel. It quit while driving down the road, like it was running out of fuel. Checked fuel pressure at the schrader valve, zero. I removed the fuel pressure regulator and clean the screen. It had a lot of trash on it. It took a lot of cranking but it finally started. Only has 10 psi of fuel pressure at idle and will only build up to about 20 psi at 2500 rpm. Very sluggish and low on power. I'm thinking the fuel pump is failing. Thanks.
Lead Driver
Joined: Mar 2006
Posts: 5,105
Likes: 1,526
From: western SD
If the truck runs the same on both tanks, I would say you are on the right track with the fuel pump. If it runs like it should on one tank and not the other, I would start looking for a hole in the fuel line from the tank that it runs poorly on.
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Senior User
Joined: May 2005
Posts: 247
Likes: 0
From: Ethridge, TN
Replaced fuel pump. Got 60 psi at idle now, runs great! Only problem, plunger and nose of pump broke off and fell into engine. Rotated the crank till I heard it fall in the pan. The sump is pretty deep, hope it stays there!
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