Fuel psi gauge installed and not good. - Ford Powerstroke Diesel Forum
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Old 04-19-2012, 02:13 PM
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Fuel psi gauge installed and not good.

So this morning I installed a fuel psi gauge. Latley my truck has had low power and I replaced the hpop cause it was not putting out enough. That helped a lot but it still didn't feel like my old truck did. I think I found out why. At idle I only read 30 psi when you get on it anything over half throttle it goes to 0. Would the blue spring help or is my fuel pump bad ?
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Old 04-19-2012, 02:20 PM
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Could be pump, If you have not done the spring you will need to do it anyway so do it now as it it less expensive than the pump. How many miles do you have on the filters? Have you checked for water in fuel? I would not drive it til you get that pressure up where it needs to be our you will be replacing injectors too.
Good luck.
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Old 04-19-2012, 02:24 PM
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Thanks man and filters are good and no water in just changed them. Could that spring really bring it up that much ?
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Old 04-19-2012, 02:28 PM
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I have heard it can make a big difference, but that 0 at 1/2 throttle makes me worried. I have not got the fuel gauge yet, I did the spring as preventive maintenance.
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Old 04-19-2012, 02:36 PM
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If it is my pump I guess that's a good excuse for a air dog Haha
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Old 04-19-2012, 02:47 PM
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You could be sucking air before the pump as well. I've been dealing with a similar issue for a bit now. Make sure all your connections are tight from the tank to the pump. If you can, hook up a different fuel line to the intake side of the pump and stick it into a fuel can and see if the pressure changes. I did this and went from 30psi to 60psi. Waiting on a new fuel line now.
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Old 04-19-2012, 02:56 PM
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Ok thanks man ill look into it
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Old 04-19-2012, 04:35 PM
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Just stretched the spring and installed a bb and now its a 20 psi ? What's the deal
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Old 04-19-2012, 04:41 PM
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Need pump! Min pressure should be no less than 40 at full load(full throttle)
I hate to be the barer of bad news but...
Do it now as low pressure is one of the leading causes of failed injectors!
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Old 04-19-2012, 04:44 PM
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So a blue spring won't help me ?
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