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I have a 2008 ford F 150 running lean. First we checked fuel…

Customer Question
I have a 2008 ford...
I have a 2008 ford F 150 running lean. First we checked fuel pressure was about 35 while running. Installed filter and fuel pump now high fuel pressure over 130 we also changed spark plugs and coil packs. It started out with no power on top end would not run at highway speeds. Now it is running very lean burning eyes and hardly running. Fuel driver looks good bowed all lines out do you have and suggestions ? Please
Submitted: 2 years ago.Category: Ford
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Customer reply replied 2 years ago
we checked driver module it looks good not corroded
Customer reply replied 2 years ago
egr hose and elbow's look good
Customer reply replied 2 years ago
how long does this take ?
Answered in 1 hour by:
1/18/2016
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago
Mike S.
Mike S., ASE Certified Technician
Category: Ford
Satisfied Customers: 8,136
Experience: ASE Certified Master Technician
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Fuel pressure over 130 psi? Are you sure about that? What engine is this?

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Customer reply replied 2 years ago
5.4 I have put 2 fuel pumps in
Customer reply replied 2 years ago
can I get my money back I think this is a scam ?
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

You never answered my question about "Fuel pressure over 130 psi? Are you sure about that?"

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

JA isn't a scam, stop reading what people put on the internet who want you to think that.

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

130 psi is way too high

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Customer reply replied 2 years ago
fuel pressure was over 130
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

It's only supposed to be 28-45 psi with the engine running and 35-45 psi with key on engine off.

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

is the engine still running lean with all that fuel pressure?

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Customer reply replied 2 years ago
fuel pressure was 35 I put filter and pump in and checked it and was over130
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

fuel pressure was fine before.

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Where did you get this pump, what are the psi specs on it or what is the brand name and model number or a link to where you got it?

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Customer reply replied 2 years ago
what would cause it to be high with the next new pump
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Where did you get this pump, what are the psi specs on it or what is the brand name and model number or a link to where you got it?

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

I cannot answer that until you answer me. If nothing has changed it must be the pump.

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Customer reply replied 2 years ago
is very lean burning my eyes and has very little throttle response
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

What did you mean by "bowed fuel lines"?

if you bent a fuel line that could cause it.

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Where did you get this pump, what are the psi specs on it or what is the brand name and model number or a link to where you got it?

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Customer reply replied 2 years ago
ot pump frm auto zone it is a delphi
Customer reply replied 2 years ago
got pump from auto zone is Delphi pump
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

is this the flex fuel 5.4 or no?

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago
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Customer reply replied 2 years ago
I bowled out fuel lines with compressed air
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

they are the flex

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Ok, blowed out. I get it.

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Customer reply replied 2 years ago
flex fuel
Customer reply replied 2 years ago
pump is DFG0851 part number
Customer reply replied 2 years ago
it is 3rd pump we tried 2nd filter all was right size and all lines hooked up the same looked like right pump
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

perhaps you blew something down the line inside the fuel line and it got stuck and is now clogging up the fuel line causing both too high of a fuel pressure and not enough fuel flow coming through causing the lean fuel condition.

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Customer reply replied 2 years ago
I took all lines of and checked they are all clear! Fumes might be coming out evak
Customer reply replied 2 years ago
evac
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

wait 1 minute, autozone is saying DFG0851 doesn't fit.

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Customer reply replied 2 years ago
2008 F150 5.4 it looked same as the one that was in it
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago
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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Do you know your wheelbase?

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Customer reply replied 2 years ago
that is the pump
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

No wait a minute, I switched over to non flex assuming this was not flex because you never mentioned it before. Let me double-check.

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Yeah, ok this fits. Sorry.

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Customer reply replied 2 years ago
it is flex fuel
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Now, back to the possible clogged fuel line. I would unhook both ends and see if you can blow air through the line only using a little pressure for now, like about 20 psi or so and go to the other end and make sure it is coming out.

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

I believe I was just reading yesterday how flex fuel vehicle fuel lines are lined with something because of the E85. Did you change any fuel lines or anything else, besides the fuel pump, as far as the fuel delivery goes?

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Customer reply replied 2 years ago
did that again this morning can actually blow with mouth
Customer reply replied 2 years ago
just new filters
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Where exactly are you testing the fuel pressure at?

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Customer reply replied 2 years ago
vin number is *****
Customer reply replied 2 years ago
on the fuel rail
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

That vin is invalid and why are you giving it to me?

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Is there any way you can check it closer to the pump?

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

What fuel are you using?

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Customer reply replied 2 years ago
only line that might be kinked is the 2 little ones in inside the tank but I can also blow through them. Thought you could get wheel base from I number, I don't think I can no fittings for that
Customer reply replied 2 years ago
vin number was or wheel base
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Is this new fuel filter a 3 port fuel filter?

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Customer reply replied 2 years ago
chevron 87 always
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

First of all the vin I believe ends with 6 numbers, you have an d in there.

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

So that's gasoline, correct?

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Customer reply replied 2 years ago
just one port in one out
Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Ok, is that what the old fuel filter had?

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Ford Mechanic: Mike S., ASE Certified Technician replied 2 years ago

Well, that does it for me, I don't know what else to think but that is too much fuel pressure. I think I'll opt out, I don't know what else it could be causing that high fuel pressure and until that is below that 45 psi, I don't think moving onto anything else is ok for now.

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Customer reply replied 2 years ago
do I get my money back mikes s could not help
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