fuel pump pressure

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Dec 18, 2012 | 09:59 PM

southtexasidi

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fuel pump pressure

my truck has been running like its running out of fuel lately, symptoms including: rough idle, surging at cruise speed, high idle, idle speed surging, basically runs like crap. I also notcied while accelerating through 2nd gear the truck tries to ''run away'' for a sec, i then let out of the throttle and continue to accelerate. I think the truck is starving for fuel, thats what it feels like at least.

I plan on checking my fuel pump pressure tomorrow. Im going to check it from the hard line from the fuel pump to the filter housing. How much pressure should I see?

Dec 18, 2012 | 11:17 PM

hairyboxnoogle

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I cant remember what the exact pressure is, but i would expect 5-7psi. You can check at the schrader valve. Ya what youre descibing sounds like its sucking air / starving for fuel.

Dec 19, 2012 | 12:16 AM

RacinNdrummin

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From: Maple Valley, WA

6psi is the best pressure I have tried. You get the most out of your pump.

Fuel pressure can cause your symptoms, but so can air intrusion...

Dec 19, 2012 | 06:47 AM

southtexasidi

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thanks, and Im going to check for air instrusion too. Ill let yall know what I find later today

Dec 19, 2012 | 10:15 AM

hairyboxnoogle

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Quote:

Originally Posted by RacinNdrummin

6psi is the best pressure I have tried. You get the most out of your pump.

Fuel pressure can cause your symptoms, but so can air intrusion...

Copy cat... lol

Dec 19, 2012 | 12:45 PM

joshofalltrades

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and make sure you change your filter if you haven't already - don't want to neglect the easiest first step

Dec 19, 2012 | 10:28 PM

southtexasidi

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Checked pump pressure today, read 3 psi at the shrader. Replacing the pump tomorrow after school, Ill change the filter too while Im at it. thanks for the help yall, hopefully Ill get the ol girl runnin good again