Replaced Fuel pump now have slight miss - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 11-12-2010, 07:20 PM Thread Starter
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Replaced Fuel pump now have slight miss

Had the fuel pump on the frame rail go out. replaced it and now have a small miss up to 60mph. It is very slight but noticeable especially when climbing a hill. I replaced it with one from Autozone as I was stranded on the side of the road on a Sunday. Did a contribition/buzz test and everything passed plus no codes are present. I am stumped as to where to start looking. Should I get a pump from ford for $421? Could it be pressure thing with the pump from Autozone?
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post #2 of 15 Old 11-13-2010, 05:18 PM
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I wouldnt use an autozone fuel pump. Get a Ford stock fuel pump or one of the better after market units. Who knows if the autozone unit is outputting the right psi.

2003 4x4 7.3 Excursion
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post #3 of 15 Old 11-13-2010, 07:03 PM Thread Starter
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that is what I first thought as it might not meet the required psi. I will swap it out and see what happens. I just hope that while the fuel pump was on its way out that it did not take an injector or two with it. But a buzz test would have shown that correct? The other thing I have noticed is that my mpg's is dropping just a bit and driving habits are not.
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post #4 of 15 Old 11-13-2010, 07:11 PM
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check your fuel pressure before throwing money at it
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post #5 of 15 Old 11-13-2010, 07:15 PM Thread Starter
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whers is the best place to check to make sure I am getting the best reading?
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post #6 of 15 Old 11-13-2010, 07:15 PM
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needs a mechanical fuel pressure gauge or if you have the sensor for it, that will work

7.3s dont read pressure results to the pcm.


i had fun tellin autozone that a new "fail safe" tstat stuck open when i returned it. one of their best ones on the shelf in the back.

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post #7 of 15 Old 11-13-2010, 10:14 PM
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I always pay more and put in oem equip on my 7.3 because i cant afford to get stuck where i go. The only time so far i have not gone ford oem, was when i bought a Napa Auto's "top of the line" new (not rebuilt)alternator. Its been working great and been a solid performer for almost a year.

2003 4x4 7.3 Excursion
JW Valve Body
Parker/Racor Bypass Filter 3-micron
Parker Marine Outboard Fuel Filter Water Separator
V Code & B Code Leaf Spring upgrade
Dual Bilstein Custom valved Front Shocks - Rear singles
4" ICON Front Shackle w/ Rear Blocks
ICON Front Pan Handle Bar
PHP CHIP-80 DD, 120 Racer, 120 Smoke, Whisper, 1200 High Idle
CCV Mod
Tymar Intake
Wicked Wheel
A self modified Riff Raff FRX w/ 900 PSI inner titanumum hose and SS outer braid. Temp rated 500 degree
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post #8 of 15 Old 11-13-2010, 10:24 PM
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I try to buy oem if its not drastically different in price.

2006 Ford F250 CCSB FX4 6.0

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1999 F350 CCLB 4WD 7.3
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post #9 of 15 Old 11-14-2010, 10:03 AM
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Except for the factory glow plug relay Stancor or Western is the way to go.

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post #10 of 15 Old 11-14-2010, 12:47 PM Thread Starter
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What should the pressure be?
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