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P0171 and 0174 codes - lean. Also misfire on cylinders 5 and
p0171 and 0174 codes - lean. Also misfire on cylinders 5 and 6 I might expect the lean condition to cause misfires, but would expect misfires on more than 2 cylinders, and likely on both sides of the … read more
Roy
Roy
shop foreman
Associate Degree
5,274 satisfied customers
I have a 2005 f150 with the 5.4 l triton motor with 124,000
I have a 2005 f150 with the 5.4 l triton motor with 124,000 miles it has been skipping at 1500 rpm . Today I changed the plugs without a problem installed new denso COils . The problem is noticed some… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
2000 F250 superduty 5.4 L gas engine 2wd. 105,000 automatic
Yes, I, the owner am 'the mechanic' symptoms--ALL of a sudden: crank, but no start. Today, got to the shrader valve on the fuel rail and measures 40 psi. I personally replaced fuel pump about 15,000 miles ago … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
6,020 satisfied customers
Rebuilt engine, misfire on cylinder 5 and 6 moved coils and
rebuilt engine, misfire on cylinder 5 and 6 moved coils and spark plugs, as well as retighten intake bolts to specs but continue to have the misfire. also cleaned idle air control valve. … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
It's a Ford, 98 expedition 5.4, 98, Yes coil injection and
It's a Ford JA: What is the model/year of your Ford? Customer: 98 expedition 5.4 JA: What year is your Expedition? Customer: 98 JA: Are you hoping to fix this yourself? What have you tried so far? Cus… read more
A. Penland
A. Penland
Ford Senior Master Technician
Vocational, Technical or Trade School
7,768 satisfied customers
FORD: I have a 2004 F250 Superduty 4x4. The check in light
I have a 2004 F250 Superduty 4x4. The check in light indicates that the Speed Sensor is providing insufficient input. The engine is misfiring and shuts off when idling of when in reverse. Where is thi… read more
Wayne Crawford
Wayne Crawford
4,037 satisfied customers
f350: heyi am getting po345 po128 po349 po 354 po128 po356
heyi am getting po345 po128 po349 po 354 po128 po356 po420, po 430 I have empytied the converter, 20006 f350, 5.4 3 valve.... its misfiring, am driving it. first problem 15 000 k ago, blew out a few p… read more
A. Penland
A. Penland
Ford Senior Master Technician
Vocational, Technical or Trade School
7,768 satisfied customers
F250: i have a 2005 f f250 5.4 the truck hesitates during take
i have a 2005 f f250 5.4 the truck hesitates during take off in gear it struggels to get up to speed an has an also lightly notable when accelarting while out of gear. i've notice slight misfire at id… read more
Steve
Steve
Ford tech Specializing in electronics
Vocational, Technical or Trade School
6,755 satisfied customers
Ford F250 Superduty: 1999 Ford F250 Superduty 5.4 4x4 Brand
1999 Ford F250 Superduty 5.4 4x4 Brand new engine Brand New Fuel injectors...105 miles on the break in.I get a PO308 code cylinder number 8 Misfire.. Spark plugs are new changed out the coil pack with… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
ford f250 super duty 5.4: i have 2003 ford f250 5.4 liter had
i have 2003 ford f250 5.4 liter had a misfire on cylinder 2 changed plug and coil pack nothing changed. Had it compression tested showed 90lbs mechanic told me to look in to getting a new motor. Does … read more
George H.
George H.
Technician
Associate Degree
19,159 satisfied customers
2005 ford f-150: 4 truck will studdard going down the road..chk
my 2005 ford f-150 5.4 fx-4 truck will studdard going down the road sometimes and there is no chk. engine light and i had tune up done recently so spark plugs are new… read more
Shawn E
Shawn E
Ford Senior Master Dealership Technician
Associate Degree
144 satisfied customers
2003 f250: 5.4 that runs bad..overdrive..misfire..coil..injector
i have a 2003 f250 with a 5.4 that runs bad when gets to overdrive and sometimes in between. scanned it has misfire on 7 replaced plug and coil still having probs. havent done a compression test but d… read more
Nathan Hosier
Nathan Hosier
senior master gas and diesel technician
Vocational, Technical or Trade Scho
149 satisfied customers
2005 f150 xlt: the accelerator pedal to go up a hill..incline..trans
Transmission buck in 2005 F150xlt w/5.4 triton. When I'm holding a steady speed and need to just slightly press the accelerator pedal to go up a hill or incline, about 50% of the time the truck will b… read more
Shawn E
Shawn E
Ford Senior Master Dealership Technician
Associate Degree
144 satisfied customers
2001 Ford Expedition: V8..It just recently blew out a spark plug..kit
I have 2001 Ford Expedition 5.4 liter V8 triton motor. It just recently blew out a spark plug and I repaired it with time sert kit and that all went just fine. Now it is running with a bad miss in the… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
1999 F250 super duty: accelerate..fuel filter..Check engine light
I have a 1999 F250 super duty 5.4 Its got a Miss mostly when your bucking a wind or going up a steep hill any time you have to accelerate. Replaced fuel pump fuel filter twice now Im doing the plugs s… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
26,187 satisfied customers
2005 ford f250: two codes..p300 and P0306 i have swaped #5..coil packs
2005 ford f250 5.4 two codes. P0300 and P0306 i have swaped #5 and #6 coil packs. Drove 30 miles no problem. restart next day same code.… read more
CTFordTech
CTFordTech
Auto Technician
Vocational, Technical or Trade Scho
4,894 satisfied customers
I have a 2005 Ford Expedition. I ran fine yesterday but ...
I have a 2005 Ford Expedition. I ran fine yesterday but today it has a strong misfire. I checked the trouble codes and found P0300, random, mulpiple cylinder misfire; and P0302, misfire cylinder 2. Th… read more
Vincent
Vincent
Automotive Technician
High School or GED
808 satisfied customers
F250: L..miss..anything-a friend scanned it and it said cyl #3 missing
My F250 5.4 L engine sporadically missed about a year ago and some fuel injector cleaner in the gas seemed to take care of it. It started to miss the same way a month a go and seems to be getting wors… read more
Fordster
Fordster
Mastertech
Vocational, Technical or Trade Scho
2,650 satisfied customers
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Meet the Experts:

Ron

Ron

ASE Certified Technician

26,187 satisfied customers

23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Chris (aka- Moose)

Chris (aka- Moose)

Technician

31,725 satisfied customers

16 years experience

John Mc

John Mc

Ford Technician

5,495 satisfied customers

19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

1,685 satisfied customers

33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance

Cam

Cam

Journeyman Automotive Technician

10 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

Mike V.

Mike V.

Auto Service Technician

1,994 satisfied customers

25 years experience on all makes and models, Licensed NYS Inspector.

Richard

Richard

ASE Certified Technician

1,535 satisfied customers

12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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