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I have a 05 f150 5.4 with 153k miles on it, It runs fine…

I have a 05...

I have a 05 f150 5.4 with 153k miles on it, It runs fine with just a slight hint of a miss but sometimes when trying to take off under heavy throttle it bogs down and make some popping sounds. Eventually when you ease up on the throttle it will take off but this issues seems to be getting worse. I have replaced plugs, coils, fuel injector, fuel pressure sensor, Fuel driver module, mass air flow sensor, vct solenoids, cats, and o2 sensors. I am at aloss for what is causing this. I was getting codes p0172 and p0175 with fuel trims down at -25% to -30% in both banks and now I am getting codes p2196 and p2198.

Mechanic's Assistant: Have you located all of the vehicle's oxygen sensors? Are the wires leading to and from each intact and in good shape?

Yes

Mechanic's Assistant: Are you fixing your F150 yourself? What have you tried so far?

Yes I listed above the work done.

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Answered in 5 minutes by:
3/23/2018
David Craig
David Craig, Auto Mechanic
Category: Ford
Satisfied Customers: 6,028
Experience: owner/mechanic at 3D Automotive
Verified

Hi my name is ***** ***** I'll be more than happy to assist you. Please allow me a few minutes to review your information. Thank you

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Customer reply replied 5 months ago
Okay thanks
Customer reply replied 5 months ago
I do have a scan tool. Last I checked the MAF was reading between 12-14. The fuel trims are always going all the way negative in the -25 to -30 range.
Customer reply replied 5 months ago
I have also checked for blockages in the air intake and replace the filter with a new stock filter.

so you are running extremely rich. whats the fuel pressure?

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Customer reply replied 5 months ago
The REL FRP KPA is reading at 2.69 at idle.

standby,

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I need to the fuel pressure from the pump.

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Customer reply replied 5 months ago
How do I check that??

is there a Schrader valve on the fuel rail?

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Customer reply replied 5 months ago
no
Customer reply replied 5 months ago
What should the pressure be?
Customer reply replied 5 months ago
Are you thinking possible fuel pump?
Customer reply replied 5 months ago
Also it seems to do it worse when I am turning left.

no. its a number I need to know to base my thoughts of whats going on.

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Customer reply replied 5 months ago
Okay ill get it checked in the morning and will get back to you.

with negative fuel trims that high, you have a bad regulator or leaky injectors or fuel pressure sensor

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Customer reply replied 5 months ago
I have changed the fuel pressure sensor and the injectors, but the injectors were aftermarket.

well if I cant get the fuel pressure I cant make an educated guess so I'm going to open this up to the other so they can chime in.

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Customer reply replied 5 months ago
I can get the fuel pressure results but it will be in the morning.
AMEDEE
AMEDEE, FORD TECHNICIAN
Category: Ford
Satisfied Customers: 28,342
Experience: ASE CERTIFIED TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
Verified

Hello and welcome. Different expert here.

YES, please get the results of the fuel pressure and reply back.

Chat then.

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Customer reply replied 5 months ago
Will do

.

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Customer reply replied 5 months ago
Here are some snap shots of live data this morning after going to get tool to test fuel pressure, will post fuel pressure results shortly.
20180323_080920.jpg2018032...jpg20180323_080929.jpg2018032...jpg20180323_080937.jpg2018032...jpg20180323_080947.jpg2018032...jpg20180323_080955.jpg2018032...jpg20180323_081001.jpg2018032...jpg

Sounds good thanks!

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Would you be willing to speak on the phone?

AMEDEE
AMEDEE, FORD TECHNICIAN
Category: Ford
Satisfied Customers: 28,342
Experience: ASE CERTIFIED TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
Verified
AMEDEE and 87 other Ford Specialists are ready to help you
Ask your own question now
Customer reply replied 5 months ago
Sure, call me(###) ###-####

Please call me now

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