Ford

Have Ford Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Ford
This answer was rated:

F150 Triton 4X4: I have a 2004 f150 triton 4X4. The engine

I have a 2004 f150...

I have a 2004 f150 triton 4X4. The engine misses (I guess) hard at around 1700 RPM under a load. No check engine lights, no codes that I've been able to capture. Usually runs fine otherwise, although sometimes seems to idle at barely 500 and will stall. Restart clears condition.


 


When the (missing?) hits, it hits hard. Almost feels like the the crankshaft is stopping for a split second...

Show More
Show Less
Ask Your Own Ford Question
Answered in 44 minutes by:
2/10/2013
autodoc_2000
autodoc_2000, Auto Technician
Category: Ford
Satisfied Customers: 2,563
Experience: ASE Master Tech W/Advanced Engine Performance, Ford Senior Master Certification
Verified

autodoc_2000 :

The most likely part that causes misfires on this vehicle is the ignition coils. There is a coil on each spark plug. Do you know if your mechanics scan tool has access to mode 6 data? Ford vehicles take awhile to set a misfire code, but mode 6 data will indicate if any cylinders have misfired. They should also be able to monitor the power balance and see if there is a misfire taking place and which cylinder is misfiring. Since there are 8 ignition coils it would be very expensive to just start replacing them.

Customer:

I have an Actron code reader like this. I've been keeping it plugged into the port. It's not logged any codes.

autodoc_2000 :

I read the information from the link you sent and it will not read data or misfires. From what I read the only information it will give you is if a code sets. Once a code sets it will give you freeze frame data which is a couple of parameters of data like rpm, coolant temp etc. It will not read mode 6 data and it will not show misfire data. Unfortunatly the only thing it will do is give you information once the code is set. As I said misfire codes take a while to set. The computer has to see a certain amount of misfires within a set amount of time. If the coil or plug was completely not working it would set it fairly quick, but since it is intermittent it may not ever set a code.

Customer:

Ok, so I'm planning on taking the vehicle to a mechanic. I just wanted to be informed before doing that so I can ask questions. Would you recommend taking the truck to the dealer? Also, the truck is at 120K miles on the original plugs, coils, etc. Should I replace it all? What do you think I should expect to pay for the work?

autodoc_2000 :

I would suggest finding someone that at least has the Ford IDS scan tool. It will pick up more information than some of the others. A Ford dealer ship should have this and some independent dealers will have it. Make some phone calls and ask if they have the IDS. At 120,000 miles the spark plugs definitely should be replaced. The coils should only be replaced if needed. If you have any mechanical ability you may be able to change the spark plugs and coils yourself if you are wanting to replace them all. Do you know which engine is in your truck?

autodoc_2000 :

If it is the 5.4 liter the spark plugs fro Ford are $19.16 a piece, The ignition coils are $83.64 a piece and the labor to do it is 2.8 hours.

Customer:

5.4Litre.

Customer:

...expensive!

Customer:

Will the shop be able to determine which coils need to be replaced?

autodoc_2000 :

Yes it is but the spark plugs should definitely be done. These spark plugs are assembled from three different pieces and sometimes come apart when removing. If this happens you need special tools in order to completely remove them. I have never had it happen, but Ford had a video out on the correct procedure to remove them.

autodoc_2000 :

They should with the aid of the IDS to pinpoint which cylinder is misfiring.

Customer:

OK thanks. Can you think of any other possible sources for this issue? It seems pretty obvious at this point based on your description of the plugs and coils.

autodoc_2000 :

In my experience this is the the ignition coils are the causes of misfires, but it is definitely time for the spark plugs. The only other thing I can think of is the fuel injectors, but I have never replaced any of them on this engine.

Customer:

Ok thanks for the advice!

autodoc_2000
autodoc_2000, Auto Technician
Category: Ford
Satisfied Customers: 2,563
Experience: ASE Master Tech W/Advanced Engine Performance, Ford Senior Master Certification
Verified
autodoc_2000 and 87 other Ford Specialists are ready to help you
Ask your own question now
Ask autodoc_2000 Your Own Question
autodoc_2000
autodoc_2000
autodoc_2000, Auto Technician
Category: Ford
Satisfied Customers: 2,563
2,563 Satisfied Customers
Experience: ASE Master Tech W/Advanced Engine Performance, Ford Senior Master Certification

autodoc_2000 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

24,320 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

28,139 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

1,380 satisfied customers

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

< Previous | Next >

Related Ford Questions
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 injector and ignition Coil wiring colours for a ford
HELLO i need injector and ignition Coil wiring colours for a ford escape 2004 V6 engine and also factory engine coolant temperature Normal conditions… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
It cranks but wont start. I changed spark plugs it started
yes I changed spark plugs it started right up drove for 2 days and wont start again … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
A few days ago change 2 engine coils and spark plugs and the
a few days ago change 2 engine coils and spark plugs and the engine light when off, but now came on again … read more
eurotec
eurotec
Vice President / Manager
Associate Degree
11 satisfied customers
I have a 1988 Ford F150 with a frozen spark plug, #5 on the
I have a 1988 Ford F150 with a frozen spark plug, #5 on the I6 motor. What can you suggest to get it out?… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
24,320 satisfied customers
Week spark at ignition coil on a 1989 ford 250 4.9. Lol,,
Week spark at ignition coil on a 1989 ford 250 4.9 … read more
roy
roy
Associate Degree
3 satisfied customers
I have a seemingly stripped spark plug in my 2008 F150. I've
I have a seemingly stripped spark plug in my 2008 F150 … read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
24,320 satisfied customers
94 ranger intake ignition coil not getting power, what could
94 ranger intake ignition coil not getting power, what could be root cause? truck still runs but not good and loss and power.… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
2005 Ford Expedition Replace all the spark plugs and coils
2005 Ford Expedition Replace all the spark plugs and coils after replacing car shack really bad… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Have code po352 and replaced the spark plug /gap correct
Hi have code po352 and replaced the spark plug /gap correct .054 changed ignition coil code still comes up and could hear it working with fuel pump working to ..any ideas … read more
davehop
davehop
Diagnostic Technician
Ford Master Certified Technician
1,171 satisfied customers
Getting spark to distributor but not to spark plugs. 1986
getting spark to distributor but not to spark plugs. 1986 ford ranger. 4 cylinder 2.3 liter engine … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
I have a spark plug in an Explorer that is stuck and now the
I have a spark plug in an Explorer that is stuck and now the spark plug is stripped … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
No power coming from it, changed out ignition coils and
no power coming from it, changed out ignition coils and connectors. wonder what it would mean. and i keep getting P2312:00-64 and P2315:00-64 codes when i scan it. … read more
Kenny Z
Kenny Z
Ford Senior Master Technician
High School or GED
16 satisfied customers
2002 ford windstar, husband replaced ignition coil and not
2002 ford windstar, husband replaced ignition coil and not it will not start … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Check engine light after changing spark plugs, stays on,
check engine light after changing spark plugs JA: Does the light stay on, or does it blink? Customer: stays on JA: What is the model/year of your Ford? Customer: 1992 F15 4.9 JA: Are you fixing your v… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
24,320 satisfied customers
Oil in spark plug well of ford 5.4 Triton engine. 3000
yes, Was told there was blown out plug, so am pulling plugs one by one to check. This is the one passenger side closest to cab … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,433 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
I replaced the spark plugs, wires, and the ignition coil and
I replaced the spark plugs, wires, and the ignition coil and I'm still getting a rough idle and my check engine light is still on for a misfire on the second cylinder. … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,410 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