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2004 F150 5.4 Triton 3V. Rough idle after decelerating when
2004 F150 5.4 Triton 3V. Rough idle after decelerating when towing...sound like a diesel. … read more
Ray M.
Ray M.
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Vocational, Technical or Trade School
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I have a 06 5.4 f150 that idles rough only in reverse after
I have a 06 5.4 f150 that idles rough only in reverse after it is warmed up … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
I have a 2008 ford F150 Lariat 5.4 flex fuel. starts great
I have a 2008 ford F150 Lariat 5.4 flex fuel. starts great but once warmed up it sounds like its missing and idles very rough. … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
Second opinion] rough idle. surges when put in park, other
Second opinion] rough idle. surges when put in park, other than that runs good … read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,022 satisfied customers
Rough idle. surges when put in park, other than that runs
rough idle. surges when put in park, other than that runs good … read more
Mike V.
Mike V.
Auto Service Technician
Subaru and Nissan factory training.
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Have a 2005 F150 4x4, 5.4 engine. the truck has 240,000 *****
have a 2005 F150 4x4, 5.4 engine. the truck has 240,000 ***** ***** on it. at idle you cannot not tell the engine is running it is so smooth. My problem is rough idle or engine will die, usually after… read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
10,970 satisfied customers
2005 ford f150 4.6l runs rough at idle, have replaced spark
2005 ford f150 4.6l runs rough at idle, have replaced spark plugs and the boots, new fuel filter, checked for vacuum leaks, compression is ok, engine smooth's out as soon you are off idle, also cleane… read more
ZZDaryl
ZZDaryl
Lead Auto Tech
Some college and advanced training
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F150: 1989 Ford f150 4x4 4.9 ltr. The truck was running fine
1989 Ford f150 4x4 4.9 ltr. The truck was running fine when I parked it. Started it up and it ran really rough and wanted to die. Then started to run normally but got down the road and started surging… read more
Fordanswerman
Fordanswerman
Ford Senior Master Technician retired
Associate Degree
3,304 satisfied customers
1989 Ford F150 XLT: Hey guys, I..Lariat..4x4..Speed Manual..Overdrive
Hey guys, I drive a 1989 Ford F150 XLT Lariat 4x4. 4.9L 300 I6 5 Speed Manual Overdrive. My fuel economy seems to be much lower than normal. It seems to idle a little rough as if it is about to die so… read more
Dieseljunky2
Dieseljunky2
Locomotive Mechanic
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2008 ford f150: rough idle..drivers side..running rough..cam sensor
my 2008 ford f150 gets a rough idle sometimes that sounds like a timing issue on drivers side when you give the 5.4 liter 3v a little gas it quits and smooths out then when the rpm's drop sometimes it… read more
Marty
Marty
Vocational, Technical or Trade Scho
576 satisfied customers
Hi, Im thinking vaccuum leak.Here is the info.2004 Ford F150 5.
Hi, I'm thinking vaccuum leak. Here is the info. 2004 Ford F150 5.4 engine 4X4. Idle is rough, but is not consistent. Seems worse when Im in gear. At approx. 1100 Rpms when say driving in a parking lo… read more
Pavlin Koev
Pavlin Koev
Diagnostic Technician
High School or GED
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Ford F-150 Lariat: w/5.4L triton v8 vin: 5..my truck..misfiring
Hello, my name is XXXXX XXXXX a 04 Ford F-150 Lariat w/5.4L triton v8 vin: 5. My problem is that the idle on my truck is very rough. it's been like that since i bought it, almost two years now. it's n… read more
BOBBYSS
BOBBYSS
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Associate Degree
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1997 f150 5.4 engine my truck is stalling at stops and idles bad. it surges when I come
1997 f150 5.4 engine my truck is stalling at stops and idles bad. it surges when I come to a stop before it stalls.… read more
Fordanswerman
Fordanswerman
Ford Senior Master Technician retired
Associate Degree
3,304 satisfied customers
1989 Ford F150 5.0L automatic 4x4. Will not pass emissions test.
1989 Ford F150 5.0L automatic 4x4. Will not pass emissions test. High HCppm at 2194 at idle and 2007 at 2500 RPM. No power and misses. Rough idle. Up and down. Just put in new plugs and filters. Has c… read more
Dieseljunky2
Dieseljunky2
Locomotive Mechanic
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409 satisfied customers
2004 f150 lariat: 4x4 with the 5.4 engine that was purchased
I have a 2004 f150 lariat 4x4 with the 5.4 engine that was purchased in Denver Co. While in Denver the truck got between 17 and 20 mpg. On trips to seattle and after moving to Seattle it only gets 9 m… read more
rpmdiag
rpmdiag
High school
8,185 satisfied customers
2001 f150: 2500 rpm..park and stays at2500 rpms no fault codes anyone
this just started this weekend i have a 2001 f150 5.4 temp outside was in single didget started truck to warm up idle about 1000 rpm's put into gear with foot on brake idle increases to 2500 rpm put i… read more
Richard
Richard
ASE Certified Technician
Vocational, Technical or Trade Scho
1,524 satisfied customers
1998 Expedition: 5.4 engine..I just drove 800 miles from Colorado
I have 1998 Expedition, 5.4 engine. I just drove 800 miles from Colorado to Arizona. Ran great. I just used the Pro-Clean system to clean injectors and cleaned, re-oiled the K&N filter. I get to city … read more
Richard
Richard
ASE Certified Technician
Vocational, Technical or Trade Scho
1,524 satisfied customers
2005 Ford F150: idleing..the gasoline, fuel filter, or does it..tune
I own a 2005 Ford F150 5.4 v8, it has just gone over 60000 miles and at times seems to be idleing a little rough. Could it be the gasoline, fuel filter, or does it require a tune up, if so what does a… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,022 satisfied customers
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Meet the Experts:

Ron

Ron

ASE Certified Technician

25,022 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

29,223 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

1,591 satisfied customers

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

Richard

Richard

ASE Certified Technician

1,524 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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