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I have a 2006 f150 5.4 3v I got a misfire code on cylinder 4
Second opinion] I have a 2006 f150 5.4 3v I got a misfire code on cylinder 4 so I replaced plugs and coil packs and injector. still misfire idles super rough and shudders bad when going up a hill or y… read more
davehop
davehop
Diagnostic Technician
Ford Master Certified Technician
1,171 satisfied customers
I have a 2006 f150 5.4 3v I got a misfire code on cylinder 4
I have a 2006 f150 5.4 3v I got a misfire code on cylinder 4 so I replaced plugs and coil packs and injector. still misfire idles super rough and shudders bad when going up a hill or you floor it. hav… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
00 f150 5.4l starts but has a misfire or "skip" to it. No
00 f150 5.4l starts but has a misfire or "skip" to it. No codes are in dtc's. I've replaced coil pks and plugs but no change. Sometimes it trys to smooth out but never does. My next step is to check f… read more
David Craig
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Hired a local guy to remove rebuild and reinstall a 5.4 3v in my 2007 f150. After two months with the engine out he brought the disassembled engine back and moved away. After reassembly and installati… read more
A. Penland
A. Penland
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Vocational, Technical or Trade School
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04 f150 5.4 3v. Keep getting p0356. We have replaced
04 f150 5.4 3v. Keep getting p0356. We have replaced everything associated with it and can't get rid of it. we even moved the coil pack and injector from another cylinder and still have this. … read more
roy
roy
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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
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2008 f150 5.4 3 valve with p0303 code fuel injector firing
2008 f150 5.4 3 valve with p0303 code fuel injector firing coil is firing has a marginally lower compression reading in #3 cylinder. Put new plugs in and the #3 plug still looks like it did when it ca… read more
Dan
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F150 fx4: 08 ford f150 5.4 3v has a miss on cylinders 1,2,3,and
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Steve W
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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
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Ford F150 Lariat: I keep getting a misfire on #8 in my 2010
I keep getting a misfire on #8 in my 2010 f150. I have had the plug, and injector replaced and still comes up with a misfire code.… read more
Ron
Ron
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25,182 satisfied customers
expedition: hi Ron.. ihaving a lot of problems with misfire
hi Ron.. ihaving a lot of problems with misfire on a 05 expedtion with a 5.4 -3v..i have changed plugs ..all new injectors..it will run great for a week or so then misfiere comes back.. last week had … read more
Ron
Ron
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Vocational, Technical or Trade Scho
25,182 satisfied customers
Goes away..all 8 plugs and injector and coil on that cylinder
I keep getting p0301 code on my truck, it will shake and shudder than it goes away. I have replaced all 8 plugs and injector and coil on that cylinder. It is a 2006 5.4 Ford Lariat 4x4. Thanks… read more
Marty
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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
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2001 F150: V8..5.4 EFI that..cylinder misfire..spark plugs
I have a 2001 F150 V8 5.4 EFI that is reading 7th cylinder misfire. I replaced the spark plugs, and it was good for a while. The engine light came on and same problem. I replaced the coil pack and it … read more
EMRSR
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coils..8 checked fuel injectors changed fuel filter change out plug
Misfire on 4 and 8 changed coils, still was misfire on 8 checked fuel injectors changed fuel filter change out plug on 8 still shows misfire… read more
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fordman312009
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2001 Grand Marquis: a bad miss..coil packs..replaced along..EGR valve
I have a 2001 Grand Marquis with a 4.6 engine. When I got the car it had a bad miss and all the coil packs and plugs were replaced along with the EGR valve. Shortly after I was getting efficiency code… read more
A. Penland
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2001 ford f150 5.4 liter. The engine is missing but comes and goes.
I have a 2001 ford f150 5.4 liter. The engine is missing but comes and goes. I thought the spark coils were wet but checked out ok. No codes are showing or any check lights. I have 3/4 tank of gas, so… read more
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2002 Expedition: V..Rough idle..fuel injection cleaner
2002 Expedition 5.4 V-8 Rough idle Missfiring New spark plugs, fuel and air filters, fuel injection cleaner. Problem continues… read more
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Ron

Ron

ASE Certified Technician

25,182 satisfied customers

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

Chris (aka- Moose)

Chris (aka- Moose)

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John Mc

John Mc

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Chuck

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Cam

Cam

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Mike V.

Mike V.

Auto Service Technician

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

Richard

Richard

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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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