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The scanner is reading that the cylinder #1 has a misfire I
The scanner is reading that the cylinder #1 has a misfire I change the ignition coil and the spark plug and it's still shaking and has a strong smell of gas when I turn it on.. … read more
Matt
Matt
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Bachelor's Degree
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I have a 2010 F150 5.4 3valve and in the last couple of
I have a 2010 F150 5.4 3valve and in the last couple of months the mpg has been dropping ,it still runs fine . I did have a DTC come up on the scanner P0316… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
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F150: A friend brought over his 07 Ford F150, 5.4 L engine.
A friend brought over his 07 Ford F150, 5.4 L engine. Some time ago he changed out the spark plugs - but did not do cyl 4. So the other day as he was driving, the check engine light came on and starte… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
26,187 satisfied customers
ford f250: hola soy roselin tengo una 2000 ford f250 5.4 ltrs
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Roy
Roy
shop foreman
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ford f150: Ford f150 5.4 2006. Replaced catalytic converter
Ford f150 5.4 2006. Replaced catalytic converter on drivers because truck was sputtering. read out said oxygen sensor before cat was over heating. Now truck runs better but still sputters when the rpm… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
26,187 satisfied customers
2005 f150: runs rough..good compression has new spark plugs new coil
i have a 2005 f150 5.4 has misfires on 4 and 7 runs rough has good compression has new spark plugs new coil and new cats what else would cause random misfires are there any known issues with this truc… read more
Cory
Cory
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2006 f150: miss..hooked..wiring, bad altenator, bad battery..bad ecm
i have a 2006 f150 4x4, after it runs for 30 minutes or so it gets a miss in it, we hooked it up to a hand held diaggnostic computer, and it came back reading a short in the wiring, bad altenator, bad… read more
Ironmike
Ironmike
ASE Master ,Ford Certified Master Tech
Vocational, Technical or Trade Scho
3,475 satisfied customers
2002 f150: p0302..misfire..you first start the engine before it warms
I have a customer with a 2002 f150 5.4. p0302 and p0316. It has a definite misfire when you first start the engine before it warms up. You do not notice it when it warms up. I swapped coils to another… read more
davehop
davehop
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Ford Master Technician. Hyundai Master Technician
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2000 ford f150: 5.4l..v8..wont start..1 coil mounting screw
2000 ford f150 5.4l v8 won't start engine cranks battery is ok. changed coils and plugs however #1 coil mounting screw is stripped and couldnt change plug or coil. still same issue when running truck … read more
A. Penland
A. Penland
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Vocational, Technical or Trade School
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2004 f150: 5.4 Truck runs rough and the codes..miss fire..leaking
Got a 2004 f150 4x4 with 5.4 Truck runs rough and the codes are random miss fire. the truck was running lean and the intake gasket was leaking and replaced. Before the gasket was replaced it also had … read more
Bamaman39
Bamaman39
Ford master diesel Tech.Ford certified
High School or GED
2,287 satisfied customers
2002 f150: rpms..40 and 50 mph, got a misfire on cyl 5..maf
my 2002 f150 5.4 L lariat shudders between 1k and 1.5k rpms only between 40 and 50 mph, got a misfire on cyl 5, changed all the plugs and #5 cop, changed fuel filter, cleaned maf, cleaned throttle bod… read more
Brad
Brad
Lead Diagnostic Technician
Vocational, Technical or Trade Scho
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2007 f150 5.4 triton rough idle getting code 303 cylinder
2007 f150 5.4 triton rough idle getting code 303 cylinder 3 misfire,mechanic changed coil pack,new plug ,injectors checked out ok.miss occurs at(NNN) NNN-NNNNrpm range ,cant figure out problem motopr … read more
Drew
Drew
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Vocational, Technical or Trade Scho
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my truck has no power,its chugging,running real rough,this
my truck has no power,its chugging,running real rough,this just started within last week what might be my problem… read more
lostrider
lostrider
lead technician/working shop foreman
Vocational, Technical or Trade Scho
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my ford f150 is running rough and my engine check light comes
my ford f150 is running rough and my engine check light comes up. When I erase the trouble codes on it it runs good for a little bit then act funky again cutting off while idling. I am getting running… read more
Kenny Z.
Kenny Z.
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High School or GED
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2006 ford expedition: steady..parts store..o2 sensor(upstream)..rough
our 2006 ford expedition started "missing" somewhat and we thought we got bad gas..emptied the tank then filled it back up with "good gas" and put a fuel treatment in..no change and then 2 days later … read more
Sam
Sam
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High School or GED
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2000 ford expedition: spark plugs..injectors..cylinders..a misfire
2000 ford expedition,5.4 engine, i have installed all new coils and spark plugs along with a set of reconditioned injectors, new air and fuel filters. when i started it up after i replaced all the par… read more
mustangmike
mustangmike
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2003 Ford F150: bad coil..idling rough..runs good..highway speeds
how is the easy way to find out if you have a bad coil, the truck starting idling rough, but runs good at highway speeds. The truck is a 2003 Ford F150 with a 4.6… read more
Mo
Mo
Vocational, Technical or Trade Scho
2001 f250: stumble..already replaced plugs and coil packs.
2001 f250 5.4 engine stumble. worse under a load. already replaced plugs and coil packs. ok when cold after it warms up it stumbles. no dtc… read more
HDGENE
HDGENE
Ford Senior Master/Diesel/Trans
8,109 satisfied customers
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Meet the Experts:

Ron

Ron

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Chris (aka- Moose)

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John Mc

John Mc

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Mike V.

Mike V.

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Richard

Richard

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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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