Ford

Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

I have a misfire in my lincoln navigator 5,4 l. Random

I have a misfire...

I have a misfire in my lincoln navigator 5,4 l

Mechanic's Assistant: How many miles are on the car? Is it a steady misfire? Or random?

Random misfire. 119000 mi

Mechanic's Assistant: What year is your Navigator?

2005

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

Yes. i have change altinator. sparkplugs. fuel control modul. coil. injector

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I dont think so

Show More
Show Less
Ask Your Own Ford Question
Answered in 5 minutes by:
3/16/2018
Mike V.
Mike V., Auto Service Technician
Category: Ford
Satisfied Customers: 26,841
Experience: 25 years experience on all makes and models, Licensed NYS Inspector.
Verified

My name is ***** ***** give me a moment to review your question Thanks.The site will prompt a call.I will let you know if it's necessary

Ask Your Own Ford Question

Is the P0300 code your only code?
Also, have you replace all the coils on it or just one?

Ask Your Own Ford Question
Customer reply replied 1 month ago
po208 p1000 po208FF po352 FF po 357 FF po358 FF po1000 FF
Customer reply replied 1 month ago
i have try to change 3 coil an all sparks plugs

Thanks for the info.

I assume the engine is running rough at idle as well as going down the road?

Ask Your Own Ford Question

I think with so many misfires that weren't resolved with the coils and plugs I would check for intake leaks. With the engine running, spray some carb cleaner along the intake manifold and see if the idle speed increases or smooths out. One code is pointing to a problem with the fuel injector, but still, I would look for the intake leak to start. If that doesn't produce any results, I believe I would take a compression test on the engine. This could give you some insight as yo what might be going on inside the engine. Its possible you have a timing issue causing all these misfire codes, but I would start with the leak check, if you have a bad intake gasket it could be causing this many misfires in my opinion. Especially since the coils didn't do anything to solve the problem.

Please let me know if there is anything else I can do to help.
Just Answer does not compensate me for my time and resources, you do when you rate my answer by using the stars at the top of the page. Payment for your question includes any follow-up questions you may have. Free trials and subscription questions still require ratings. Your question does not close after you rate. You will still be able to contact me by replying to this post.
Thank you so much!

Mike V.
Mike V., Auto Service Technician
Category: Ford
Satisfied Customers: 26,841
Experience: 25 years experience on all makes and models, Licensed NYS Inspector.
Verified
Mike V. and 87 other Ford Specialists are ready to help you
Ask your own question now
Was this answer helpful?
Ask Mike V. Your Own Question
Mike V.
Mike V.
Mike V., Auto Service Technician
Category: Ford
Satisfied Customers: 26,841
26,841 Satisfied Customers
Experience: 25 years experience on all makes and models, Licensed NYS Inspector.

Mike V. is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on.

Rich DUSA

Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me.

MollyUSA

I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service.

Jason V.Kirkland, WA

I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there.

BRNew Jersey

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

< Previous | Next >

Meet the Experts:

Ron

Ron

ASE Certified Technician

24,610 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

28,466 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.

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.

Mike V.

Mike V.

Auto Service Technician

26,841 satisfied customers

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

< Previous | Next >

Related Ford Questions
250 Ford: 6.0L..diesel..A water in fuel light just came on
I have a 2005 250 Ford 6.0L diesel. A water in fuel light just came on. This has happened before and I did nothing. What should I do? What are the consequences? How do I correct this if anything needs… read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
Ford Powerstroke 6.0: Will a short in the injector woring harness
Will a short in the injector woring harness cause the fuel injection control module (FICM) to give a false reading.Test the FICM with key on and reads 47 v while cranking and running it drops to 25v .… read more
Steve W
Steve W
Line Technician
Vocational, Technical or Trade Scho
1,968 satisfied customers
f150 ecoboost: Here is the problem: I have a new 2012 f150
Here is the problem: I have a new 2012 f150 ecoboost (now at 10000miles) that have terrible MPG since new, I'm averaging 12mpg since I bought it and I'm really not ruff on it. I'm not able to get more… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,466 satisfied customers
1 fuel injector is not firing. Fine.. It just runs rough.
I found that when checking the connector to ground and hot... … read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
Have an 04 V6 3.9L that needed an engine. Put an engine from
Have an 04 V6 3.9L that needed an engine. Put an engine from an 01 V6 3.8 L in it and also replaced the fuel pump and filter. The engine cranks and fuel pump primes but does not start. We found that t… read more
Matt
Matt
Engineer
Bachelor\u0027s Degree
5 satisfied customers
2001 ford ranger 3.0 i have changed all fuel injectors coil
2001 ford ranger 3.0 i have changed all fuel injectors coil pack, spark plugs, wires and have done compressoon test avgerage 120 lbs/cyl codes say p0172 rich ,p0300random misfire,p0301 #1misfire need … read more
rpmdiag
rpmdiag
High school
7,499 satisfied customers
I am replaceing a bad fuel injector (4) cylinder. I was able
I am replaceing a bad fuel injector (4) cylinder. I was able to get the upper manifold off but the fuel is still attached to the upper manifold. I got two of the out screws out but I was unable to get… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,466 satisfied customers
What needs to be done to replace the #3 fuel injector on a
What needs to be done to replace the #3 fuel injector on a 2000 windstar 3.8l. What needs to be taken off first, then second, etc;. never attempted this before. I know first remove the wiper blades an… read more
jim
jim
Vocational, Technical or Trade Scho
702 satisfied customers
I need to replace a fuel injector (#5) on a 1990 Ford F-250,
I need to replace a fuel injector (#5) on a 1990 Ford F-250, 7.3 litter diesel. I messed the male threads as part of a reinstall on an rebuilt injector pump.… read more
tim37857
tim37857
Mechanic
High School or GED
71 satisfied customers
I am having the same fuel injector curse it looks like many
I am having the same fuel injector curse it looks like many others have had. Truck is a 1990 F250 with a 7.5L/460. I have spark and compression and have set timing. I have check all grounds that I can… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,466 satisfied customers
How can I find the fuel injectors on my Mercury Grand
How can I find the fuel injectors on my Mercury Grand Marquee 2001? Can I clean the injectors myself? Or must I spend 300 dollars plus at the Ford Garage Service Center. William Hayward… read more
Fordster
Fordster
Mastertech
Vocational, Technical or Trade Scho
2,650 satisfied customers
No power is going to the fuel Injector in my 2008 Ford
No power is going to the fuel Injector in my 2008 Ford Fusion … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,036 satisfied customers
I think my fuel injectors are leaking gas after I installed
I think my fuel injectors are leaking gas after I installed a new coil. And I don't think the coil is set firmly on spark plugs...how can I correct?… read more
6Bucs
6Bucs
Senior Master Tech
Associate Degree
3 satisfied customers
I was changing my spark plugs and unhooked my fuel injector
i was changing my spark plugs and unhooked my fuel injector sencer and loosen the bolts also then alittle gas came out then i put every thing back together and started it and gas was spraying every wa… read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
P0272, fuel injector 4 is bad and code p2284. icp sensor.
p0272, fuel injector 4 is bad and code p2284. icp sensor. Trying to figure all this out. problem is it runs like crap when cold. after 10 minutes or so it runs better. Ford put revx in it 2 years ago … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
Does Ford recommend replacing all fuel injectors when an
Does Ford recommend replacing all fuel injectors when an engine is overhauled/replaced? If so, where? … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,038 satisfied customers
Only four fuel injectors are firing. A gas hog, starts only
Yes, tested fuel injector connections only four are receiving power … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,280 satisfied customers
It needs fuel injectors replaces and lines cleaned, as well
it needs fuel injectors replaces and lines cleaned, as well as intake redone … read more
Gunvir Singh
Gunvir Singh
1,949 satisfied customers
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.

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.

Show MoreShow Less

Ask Your Question

x