Ford

Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

My name is ***** ***** Winston and my 2005 ford expedition…

Customer Question
Hello my name is...

Hello my name is ***** ***** Winston and my 2005 ford expedition is getting a po303 misfire code.

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

Sure. well it started about 3 mouths ago I was driving to Vegas and just as I got maybe 30 minutes outside of city limits my truck started running funny. I sounded like it was going to die but never did. Next day I took it in to get my oil changed and told them what had happen. The mechanic came out and said my number 3 spark plug came out. I didn't believe it but he said you might start looking at maybe buying another vehicle cause your model of vehicle is notorious for that. So he put plug back in and a few weeks later I took it to the Ford Dealer had them to check it out. They told me that it was my PCM was bad and I needed another one. So I bought one off line and it came flashed and programmed so I installed it and my truck is doing the exact same thing as before. It was a little rough at stopsigns, and at very low speeds it feels like a car with a very big cam in it. So im at a lost and need some insight

Submitted: 2 years ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 18 minutes by:
2/1/2016
Ford Mechanic: AZTechBrian, ASE Certified Technician replied 2 years ago
AZTechBrian
AZTechBrian, ASE Certified Technician
Category: Ford
Satisfied Customers: 732
Experience: Owner
Verified

Hello. If your spark plug blew out, it would have been very loud. Was it very loud when this supposedly happened?

What did they do to repair the plug that had blown out? Did they simply screw the plug back in? were the threads damaged forcing them to install a heli coil?

the P0303 code indicates a cylinder 3 misfire. There are multiple potential causes of a misfire, but most commonly it's an ignition coil. If your plug did blow out of the head, depending on the quality of the repair you may have damaged ignition coil wires, bad coil (if they didn't replace it) bad plug (if they didn't replace it) low compression, etc.

Ask Your Own Ford Question
Was this answer helpful?
Ask Ron Your Own Question
Ron
Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 24,320
24,320 Satisfied Customers
Experience: 23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Ron 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

28,466 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

1,455 satisfied customers

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

< Previous | Next >

Related Ford Questions
I have a 1995 ford f250 4x4 5.8L that will not start. I have
I have a 1995 ford f250 4x4 5.8L that will not start. I have replaced the Ignition module, cap and rotor, and made sure the inersa switch is working. I have spark and fuel, it won't even run on ether… read more
Dieseljunky2
Dieseljunky2
Locomotive Mechanic
Ford Certified Technician
310 satisfied customers
2001 Ford Ranger XLT: 3.0 v6..the spark plugs wires go..coil pack
I have a 2001 Ford Ranger XLT 3.0 v6 I was wanting to know how the spark plugs wires go from the coil pack to the plugs I know the firing order i just dont know what order they go in from the coil pac… read more
lostrider
lostrider
lead technician/working shop foreman
Vocational, Technical or Trade Scho
2,958 satisfied customers
i have a 2002 lincoln navigator and trying to replace the spark
i have a 2002 lincoln navigator and trying to replace the spark plugs but cant find them on a 5.4 v-8 intech motor.… read more
CTFordTech
CTFordTech
Auto Technician
Vocational, Technical or Trade Scho
4,460 satisfied customers
removing spark plugs from a 5.8 ford pickup that are rusted
removing spark plugs from a 5.8 ford pickup that are rusted in place, any tips without removing the heads?… read more
The Geezer
The Geezer
Master's Degree
120 satisfied customers
Having trouble finding where the spark plug wires go from
Having trouble finding where the spark plug wires go from each cylinder to iginiyion coil in the right firing order … read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
Changed spark plug wires and plugs on 2007 f150 v6 and don't
Changed spark plug wires and plugs on 2007 f150 v6 and don't know order of wires from coil pack to spark plugs… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
Looking for procedure to replace ignition coils on 2004
looking for procedure to replace ignition coils on 2004 Thunderbird … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Ssn. 2010 ford escape hybrid 2010. Fuel pump, spark plug
ssn JA: What is the model/year of your Ford? Customer: 2010 ford escape hybrid 2010 JA: Are you fixing your Escape Hybrid yourself? What have you tried so far? Customer: fuel pump , spark plug coils n… read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
554 satisfied customers
2007 ford focus, how often do you services the spark plugs.
2007 ford focus, how often do you services the spark plugs. What kind of power steering fluid should I use I sucked it out not sure what kind of fliud to put back in. Napa said dextron V.… read more
Kevin
Kevin
workshop foreman /master tech/mot tester
1 satisfied customers
Want to change spark plugs on my 2002f-150, My truck is
Want to change spark plugs on my 2002f-150 JA: Okay, I'll connect you to the mechanic to go over that information regarding your Ford. Before I do, is there anything else you want him to know? Custome… read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 satisfied customers
Just had spark plugs and ignition coils replaced on 2004
Just had spark plugs and ignition coils replaced on 2004 ford escape. The car was running rough, hesitating. After repair car ran good for 2 days, then check engine light came on again and the car had… read more
HDGENE
HDGENE
Master Technician/Lead Technician
Associate Degree
2,835 satisfied customers
I replaced ignition coil and plug with OE STUFF. Still have
I replaced ignition coil and plug with OE STUFF. Still have bad misfire cylinder two! Late last year had a misfire cylinders one and two dealer said new engine, charges me five grand! Believe they onl… read more
Steve W
Steve W
Line Technician
Vocational, Technical or Trade Scho
1,968 satisfied customers
The VTC solenoids and spark plugs have been changed. it
The VTC solenoids and spark plugs have been changed. it seemed to be running better and still is, but the check engine light is still on. What now? 2009 Ford Flex… read more
Ron
Ron
ASE Certified Technician
24,320 satisfied customers
1999 Ford F250 Super Duty: ignition coil..V10
Is it fairly easy to replace ignition coil on 1999 Ford F250 Super Duty V10? How can I tell which was is bad?… read more
j_ramsey
j_ramsey
High School or GED
480 satisfied customers
Ford F150 Pickup 4x2 I have a 97 f150 4.2l with a misfire
I have a 97 f150 4.2l with a misfire in cylinder #6. Plugs, wires , and coil have been replaced. I have checked wires and plugs for functionality. The new coil still shows a PO351 fault code as the or… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
2002 Ford Expedition: dtc p0308 cylinder 8 misfire detectedhow
I have a 2002 Ford Expedition 5.4 and I am getting this DTC P0308 cylinder 8 misfire detected how do I fix this issue… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
1992 ford f-150: a 5 litre 302 truck..parked..coil wire..running fine
have a 1992 ford f-150 4x4 with a 5 litre 302 truck will turn over but not start, parked it a couple days ago and went out to start it yesterday and will not start, i checked the spark off the coil wi… read more
Tim West
Tim West
Service Manager
Computer/ Automotive certifications
16 satisfied customers
How do I replace the ignition coils on a 2001 Ford F150 5.4 V8
how do I replace the ignition coils on a 2001 Ford F150 5.4 V8… read more
Marc
Marc
fleet supervisor
Vocational, Technical or Trade Scho
1,140 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