Ford fuel pump part #?
Fleet Mechanic
Joined: Sep 2009
Posts: 1,404
Likes: 14
From: Bloomington, IN
Ford fuel pump part number for 7.3L
The Ford part number for the frame mounted fuel pump assy is: F81Z-9C407-AC and the Bosch OEM fuel pump part number for this application is: F81U-9350-AA These are for the 1999-03 7.3L vehicles.
If you are needing one, I have them...Ford OEM new.
If you are needing one, I have them...Ford OEM new.
Fleet Mechanic
Joined: Sep 2009
Posts: 1,404
Likes: 14
From: Bloomington, IN
performance testing
As for the Walbro, Airtex, Nippon Denso and even Ford diesel fuel pumps in the 7.3L applications, the performance and durability testing has proven that Bosch is the king!! We have done extensive testing to prove out "which" is the better diesel fuel pump and its was hands down Bosch. Even in the salt spray testing, Bosch withstood the elements much better, thats why Ford Engineering decided to source Bosch with the business back when this design was launched.
Now, with that said I am NOT suggesting that the other brands are junk, but they just didn't hold up under testing as well as Bosch. I am sure their pumps will be ok but let's face it, when it comes to OEM parts not many compare.
Now, with that said I am NOT suggesting that the other brands are junk, but they just didn't hold up under testing as well as Bosch. I am sure their pumps will be ok but let's face it, when it comes to OEM parts not many compare.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I read all the specs, graphs, and construction methods on everything pump-related when I was planning for my injector upgrade. The Bosch OEM got my money. You can save a few bucks on parts, but aren't you defeating the "Superduty" concept? If Wal*Mart sold a 3/4-ton or 1-ton diesel pickup for a lower price than our rigs, would you want to buy it?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
MSRP: $580.98
FTE sponsor tousleyfordparts.com price: $383.45 / Tousley Ford ~ White Bear Lake MN
FTE sponsor horizonpartsguy.com (formerly partsguyed.com) price: $418.31 / Horizon Ford ~ Seattle (Tukwila) WA
Type the part number into Horizon's or Tousley's site, then scroll thru 11 pages that contain 109 different applications,
cuz it was used on more than just 1999/2003 Stupor Duty diesels.
How many of y'all miss Ed Olson?
FTE sponsor tousleyfordparts.com price: $383.45 / Tousley Ford ~ White Bear Lake MN
FTE sponsor horizonpartsguy.com (formerly partsguyed.com) price: $418.31 / Horizon Ford ~ Seattle (Tukwila) WA
Type the part number into Horizon's or Tousley's site, then scroll thru 11 pages that contain 109 different applications,
cuz it was used on more than just 1999/2003 Stupor Duty diesels.How many of y'all miss Ed Olson?
Thread Starter
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Fleet Mechanic
Joined: Apr 2011
Posts: 1,441
Likes: 6
From: Marseilles IL
I read all the specs, graphs, and construction methods on everything pump-related when I was planning for my injector upgrade. The Bosch OEM got my money. You can save a few bucks on parts, but aren't you defeating the "Superduty" concept? If Wal*Mart sold a 3/4-ton or 1-ton diesel pickup for a lower price than our rigs, would you want to buy it?
More Turbo
Joined: Aug 2008
Posts: 593
Likes: 1
From: Frankfort, KY
What is your pressure issue? Too low? The fuel pressure regulator disintegrates over time. That happened to me. I think I have a thread on that sonewhere...
I can buy 8 pumps for the price of an OEM. Wonder which will last longer, 1 OEM or 8 knockoffs?
I can buy 8 pumps for the price of an OEM. Wonder which will last longer, 1 OEM or 8 knockoffs?
Thread Starter
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Fleet Mechanic
Joined: Apr 2011
Posts: 1,441
Likes: 6
From: Marseilles IL
My 200cc Hybrid injectors are sucking my pressure down in my drag tune. My stock pump is 13 years old and 220k miles. It can't hurt to have a new pump. I will also be getting a full regulated return with fuel bowl delete when money allows.
Fleet Mechanic
Joined: Sep 2009
Posts: 1,404
Likes: 14
From: Bloomington, IN
Well tell me which aftermarket fuel pump you are referring to and I can check the performance test results and let you know, that is if it even made the top 5 diesel fuel pumps tested for this application. Even if you prefer less quality over OEM parts (due to cost), sometimes it makes sense and sometimes it doesn't.
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Fleet Mechanic
Joined: Apr 2011
Posts: 1,441
Likes: 6
From: Marseilles IL
A new stock replacement Bosch pump should be here today. It's not costing me anything. Gotta love that! I will know if it helps my fuel pressure drop later today. I need to decide if I should put the black spring in my FRx to bump up the pressure to 66-72 lbs. I think I remember reading 68 lbs is recomended? Does anyone know for sure?
More Turbo
Joined: Aug 2008
Posts: 593
Likes: 1
From: Frankfort, KY
A new stock replacement Bosch pump should be here today. It's not costing me anything. Gotta love that! I will know if it helps my fuel pressure drop later today. I need to decide if I should put the black spring in my FRx to bump up the pressure to 66-72 lbs. I think I remember reading 68 lbs is recomended? Does anyone know for sure?
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I'm late to this party. Higher pressure slows the pump and the fuel speed in the lines. Flooring the pedal puts a surprise demand on the pump and it has to overcome the inertia of the fuel... cause a momentary heavy dip in fuel pressure. A lower fuel pressure spring keeps the pump and fuel speed up, reducing the momentary dip. Lower fuel pressure aids more stable fuel pressure. I know the OEM is good for 160CC sticks, but I don't know if it's up for 200CC sticks.
Thread Starter
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Fleet Mechanic
Joined: Apr 2011
Posts: 1,441
Likes: 6
From: Marseilles IL
I'm late to this party. Higher pressure slows the pump and the fuel speed in the lines. Flooring the pedal puts a surprise demand on the pump and it has to overcome the inertia of the fuel... cause a momentary heavy dip in fuel pressure. A lower fuel pressure spring keeps the pump and fuel speed up, reducing the momentary dip. Lower fuel pressure aids more stable fuel pressure. I know the OEM is good for 160CC sticks, but I don't know if it's up for 200CC sticks.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I'd have to look it up again (I'm on a different computer), but I believe stock is 55 PSI, and I run 62 right now... but I may go to a lower spring in the FRx. I can see the fuel pressure dip to just under 45 for a second when I hit it, but the fuel pressure recovers to no less than 50 all the way up the tach. Brand new OEM fuel pump plus all the fuel mods: [LINK]
Thread Starter
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Fleet Mechanic
Joined: Apr 2011
Posts: 1,441
Likes: 6
From: Marseilles IL
I'd have to look it up again (I'm on a different computer), but I believe stock is 55 PSI, and I run 62 right now... but I may go to a lower spring in the FRx. I can see the fuel pressure dip to just under 45 for a second when I hit it, but the fuel pressure recovers to no less than 50 all the way up the tach. Brand new OEM fuel pump plus all the fuel mods: [LINK]
New pump ready for install this morning.
