Replaced Fuel pump now have slight miss

[rdrx7]

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?

[BraveHeartCalif]

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.

[rdrx7]

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.

[atvrider93]

check your fuel pressure before throwing money at it

[rdrx7]

whers is the best place to check to make sure I am getting the best reading?

[Jarrod B]

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.

[BraveHeartCalif]

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.

[Jarrod B]

I try to buy oem if its not drastically different in price.

[Tempsho]

Except for the factory glow plug relay Stancor or Western is the way to go.

[rdrx7]

What should the pressure be?