Fuel pump update harness

Reply Subscribe

Thread Tools

Search this Thread

May 7, 2013 | 07:45 PM

FossenRacing

Thread Starter

Senior User

Joined: Dec 2009

Posts: 281

Likes: 0

From: Alberta, Canada

Fuel pump update harness

I just bought a new fuel pump and received a new harness with it.
2 hour trip home I tore into my 6.0l and installed the pump.
Opened up the box of the new harness and knew instantly I was in trouble.
It looks like a harness extension.
The one end looks like it will work but the other is a flat style connector and the fuel pump connector is round style.

Part number: 8c3z-9f759-AA

Can someone give me some info on this
Or did my parts man fudge it up.

May 7, 2013 | 08:22 PM

BLADE35

Hotshot

Joined: Apr 2010

Posts: 19,060

Likes: 238

From: Saratoga Springs,UT

Well the fUEL Heater has been deleated

I think thats what this is about

May 7, 2013 | 08:27 PM

FossenRacing

Thread Starter

Senior User

Joined: Dec 2009

Posts: 281

Likes: 0

From: Alberta, Canada

Quote:

Originally Posted by BLADE35

Well the fUEL Heater has been deleated

I think thats what this is about

So the harness I received is to remove the modules or relays that power the fuel heater.

And will that hurt my truck in the middle of winter when it's -30 degrees Celsius.

May 7, 2013 | 08:30 PM

MC5C

Posting Guru

Joined: Jun 2012

Posts: 1,171

Likes: 2

It didn't hurt my truck any, I have the new style HFCM.

Brian

May 7, 2013 | 08:40 PM

FossenRacing

Thread Starter

Senior User

Joined: Dec 2009

Posts: 281

Likes: 0

From: Alberta, Canada

Quote:

Originally Posted by MC5C

It didn't hurt my truck any, I have the new style HFCM.

Brian

Where did that harness go? I'm guessing its by the drivers side under hood fuses.
And what did you do with the now useless plug for fuel heater.

May 7, 2013 | 08:57 PM

Bullitt390

Certified Thread Hijacker

Joined: Aug 2001

Posts: 14,441

Likes: 60

The new harness replaces the old harness near the fuel pump.

Josh

May 7, 2013 | 09:16 PM

FossenRacing

Thread Starter

Senior User

Joined: Dec 2009

Posts: 281

Likes: 0

From: Alberta, Canada

Quote:

Originally Posted by Bullitt390

The new harness replaces the old harness near the fuel pump.

Josh

Obviously I have the wrong harness then.
The harness I have has one oval 4 pin and one rectangle 4 pin.
The new pump has 2 2 pin connectors.
And the trucks body harness is a circle 8 pin connector.
(Only 6 pins).

The harness I have is 8c3z-9f759-AA
I seen a 6c3z-9f759-A that's what most people used.
Looks like the parts man is blind.
Packaging reference (cross dock)

I'm guessing its ok to use the original harness as long as I seal the old heater connector pigtail.

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Joe Kucinski

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Brett Foote

Top 10 Ford Truck Tragedies

Joe Kucinski

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

Brett Foote

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Michael S. Palmer

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Verdad Gallardo

10 Best Ford Truck Engines We Miss the Most!

Joe Kucinski

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Brett Foote

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Michael S. Palmer

10 Most Surprising 2026 Ford Truck Features!

Joe Kucinski

May 7, 2013 | 10:36 PM

bismic

Fleet Owner

Joined: Nov 2003

Posts: 27,897

Likes: 3,615

Definitely seal the pigtail.

May 7, 2013 | 10:40 PM

#10

FossenRacing

Thread Starter

Senior User

Joined: Dec 2009

Posts: 281

Likes: 0

From: Alberta, Canada

Quote:

Originally Posted by bismic

Definitely seal the pigtail.

Least of my worries. Fuel pressure is good but drops at 2750. So I think I have a cracked head. Smokes black on throttle and white when it returns to idle.
I noticed my oil leak is in fact a slow coolant leak.
So I think the drivers side head is fubar'd.

May 7, 2013 | 11:10 PM

#11

BLADE35

Hotshot

Joined: Apr 2010

Posts: 19,060

Likes: 238

From: Saratoga Springs,UT

Quote:

Originally Posted by FossenRacing

Least of my worries..

Well if your NOT Worried about Blowing a Fuse and Being Stranded

Quote:

Originally Posted by FossenRacing

Fuel pressure is good but drops at 2750. So I think I have a cracked head. Smokes black on throttle and white when it returns to idle.
I noticed my oil leak is in fact a slow coolant leak.
So I think the drivers side head is fubar'd.

You may have a Better chance winning the Lotto then a Bad Head that developes a External Coolant leak Not Common

SOunds like Bad injectors from Low Fuel Pressure

The Colant leak is probably the Small egr cooler hose

May 7, 2013 | 11:38 PM

#12

FossenRacing

Thread Starter

Senior User

Joined: Dec 2009

Posts: 281

Likes: 0

From: Alberta, Canada

Quote:

Originally Posted by BLADE35

Well if your NOT Worried about Blowing a Fuse and Being Stranded

You may have a Better chance winning the Lotto then a Bad Head that developes a External Coolant leak Not Common

SOunds like Bad injectors from Low Fuel Pressure

The Colant leak is probably the Small egr cooler hose

Haha. I won't drive the truck any where till its fixed then I will worry bout it. But I will address it.

Is it possible for a injector to just dump fuel.
The truck will stumble bad if you rev it up to 2500rpm and let right off. I then shut it of and couldn't get it started again.
It was like it flooded bad.
Cranked on it 4 times for 5 seconds then it fired up.

I was hoping I wouldn't have to open it up but I am out of options

May 8, 2013 | 06:21 AM

#13

bismic

Fleet Owner

Joined: Nov 2003

Posts: 27,897

Likes: 3,615

Least of my worries also come to think about it - LOL
I agree Benny - sounds more like an injector(s) issue due to inadequate fuel supply/pressure, which can (or did) lead to hydrolocking and more. Those issues are a lot more critical than a thread on a harness.