Cadillac

Cadillac repair questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

Code 300 P misfire. I take the coil wire at the power coil…

Customer Question
Code 300 P misfire ...

Code 300 P misfire

Mechanic's Assistant: Have you seen the misfire code before? Has the car been stalling?

I take the coil wire at the power coil pack on the front

Mechanic's Assistant: What year is your 300?

2005 Cadillac Deville

Mechanic's Assistant: Are you fixing your 300 yourself? What have you tried so far?

Take a coil wire at the front

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

I take the coil wire at the front the car runs take one of the back cover dies

Submitted: 7 months ago.Category: Cadillac
Show More
Show Less
Ask Your Own Cadillac Question
Answered in 5 minutes by:
12/17/2017
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago
David Craig
David Craig, Auto Mechanic
Category: Cadillac
Satisfied Customers: 5,811
Experience: Owner/Mechanic at 3D Automotive
Verified

Hi my name is ***** ***** I'll be more than happy to assist you, Please allow me a few minutes to review your information. Thank you.

Ask Your Own Cadillac Question
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

you take the coil wire and do what?

Ask Your Own Cadillac Question
Customer reply replied 7 months ago
Disconnect the front one altogether Take the back one off and it dies
Customer reply replied 7 months ago
Do you think my coils in the front are bad
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

you need to check all cylinders for spark

Ask Your Own Cadillac Question
Cadillac Mechanic: David Craig, Auto Mechanic replied 7 months ago

hows it going?

Ask Your Own Cadillac Question
Cadillac Mechanic: Lou P., ASE Certified Technician replied 7 months ago
Lou P.
Lou P., ASE Certified Technician
Category: Cadillac
Satisfied Customers: 6,104
Experience: I Have knowledge in almost all car lines and can help with general questions and more!!!!!
Verified

Hello, Lou here,

I can help with this issue.

it sounds like the coil pack or 1 coil on the pack are faulty.

you seem to be on the right track, these are somewhat hard to diagnose unless you can get used ones from the junk yard so you can swap them out 1 at a time, but from what I know the coils were updated to a better set.

I would change the coils and also the plugs since you will have them out.

hope this helps

if at any time you need more assistance please just let me know.

Lou

Ask Your Own Cadillac Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a cadillac mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Lou P. Your Own Question
Lou P.
Lou P.
Lou P., ASE Certified Technician
Category: Cadillac
Satisfied Customers: 6,104
6,104 Satisfied Customers
Experience: I Have knowledge in almost all car lines and can help with general questions and more!!!!!

Lou P. 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:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Jerry Newton

Jerry Newton

Cadillac Technician

1,730 satisfied customers

ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.

Dave Nova

Dave Nova

Cadillac Technician

1,522 satisfied customers

ASE Master Certification. GM World Class Certification

Gm Tech (Cam)

Gm Tech (Cam)

Cadillac Mechanic

1,075 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

John

John

ASE Certified Technician

941 satisfied customers

ASE CERTIFICATIONS A1-A8 & L1 / 40 YEARS AUTOMOTIVE EXPERIENCE

Chris (aka- Moose)

Chris (aka- Moose)

Cadillac Technician

795 satisfied customers

16 years of experience

George H.

George H.

ASE Certified Technician

781 satisfied customers

ASE Master Tech 15+ Years

Don - Mo Lurch

Don - Mo Lurch

Cadillac Technician

704 satisfied customers

GM, Cadillac Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

< Previous | Next >

Related Cadillac Questions
Need someone now who can stay with me: 2004 Cadillac DeVille
Need someone now who can stay with me: 2004 Cadillac DeVille multiple misfire P0300. Code reader live data shows misfires all over, but mostly cylinders 1,2,3. Also have P0742 code. Tools I have... Co… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
158 satisfied customers
Missing going down the road. just changed the coil pack on
missing going down the road. just changed the coil pack on the front of the northstar due to p300 and p304 codes. smoothed it out at idle now rough going down the road … read more
Clayso
Clayso
Shop Owner Master Technician
ASE Master Certified Automobile Technician
879 satisfied customers
Need help with which parts to buy cadillac dts 2006 Error
need help with which parts to buy for a cadillac dts 2006 Error codes are: 1/5 - C0899 - ABS - Device 1 Voltage Low (History) 2/5 - C0561 - ABS - System Disabled Info, Stored Invalid, Serial Data Rece… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,450 satisfied customers
My Caddy Deville 2003 Base misfires, rough ride especially
My Caddy Deville 2003 Base misfires, rough ride especially on low speed, the entire car shakes. Had front coil pack replaced 6 months ago. How to tell which coil pack is bad - front or rear? Thanks. … read more
Joshua Haynes
Joshua Haynes
Associate
273 satisfied customers
I'm working on a 2003 Cadillac CTS 3.2L. I replaced the
I'm working on a 2003 Cadillac CTS 3.2L. I replaced the valve cover gasket on the drivers side and now I'm getting random misfire code P0300 as well as misfire codes for cylinders 2,4, and 6. Next I r… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
158 satisfied customers
Cadillac Deville: my 2001 Cadillac DeVille is idling rough
my 2001 Cadillac DeVille is idling rough I took it to Autozone and the first code that popped up was p 0308 misfire detected on number 8 cylinderother codes also popped up0741 ECM detected cylinoide f… read more
George H.
George H.
ASE Certified Technician
Associate Degree
781 satisfied customers
Cadillac Deville: I have a 2003 cadillac deville with a 4.6
I have a 2003 cadillac deville with a 4.6 litre engine. Am getting a P0305, a misfire on cylinder 5. Have replaced all spark plugs and coil pack. Am still getting the same code. Thanks… read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,730 satisfied customers
Cadillac deville: Hi, 2003 deville question, 0300 code #6 misfire,
Hi, 2003 deville question, 0300 code #6 misfire, upon acceleration at about 2000 rpm i seem to get a smoothing out of the rough idle and the feeling of more steady even acceleration however atidle or … read more
shawnrbaldwin
shawnrbaldwin
Owner/mechanic
367 satisfied customers
Cadillac Deville: I have a 2002 Cadillac Deville North Star
I have a 2002 Cadillac Deville North Star V-8 Sereal # XXXXX Y 145,000 miles last week i had the front bank spark plugs coil pack with new boots replaced the car ran great again i had # XXXXX cylinder… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
19,637 satisfied customers
Cadillac Deville: 2005 Cadillac Deville intermittently goes
2005 Cadillac Deville intermittently goes dead on all four coils near radiator. You can unplug the coil master harness plug and makes no difference on idle. When left four coils are dead, car will run… read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,730 satisfied customers
2000 Cadillac deville: engine light came..coil pack boot..cylinder
2000 Cadillac deville started missing all the time and ck engine light came on.... I had a po1360 and a po302 code I replaced the coil pack boot and plug I on number 2 cylinder. Now just po302 showes … read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
2005 cadillac deville: stop sign..only stay running..shifting..neutral
2005 cadillac deville starts jerking and bucking when hot. I have replaced both coil packs. When at a stop sign or red light, it will only stay running by shifting into neutral.… read more
Neal
Neal
Auto repair pro, 30 years experience
Associate Degree
1 satisfied customers
DTC P0304 Misfire Detected last code..coil pack..cylinder..disable
DTC P0304 Misfire Detected last code after computer cleared and checked. I have been told it is simply plugs and wires to the a coil pack for the back p-art of cylinder 4 and i have been told a cylind… read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
2002 Cadillac Deville: PCM..cyl..my check engine light coming..freeway
I have a 2002 Cadillac Deville DTS. In the last year or so, I have replaced the PCM, Idle Control Valve, last week all new platinum plugs. I still have a miss in cyl 5 according the code by my mechani… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
158 satisfied customers
1999 cadillac catera: hey..a miss fire on a cylinder..coil pack
hey there i got a 1999 cadillac catera with a miss all the time it has a code showing a miss fire on a cylinder and when i pulled the plug wire off the plug on the front on right side there was alot o… read more
Dave Nova
Dave Nova
Cadillac Technician
Associate Degree
1,522 satisfied customers
HAVE A 2003 CADILLAC DEVILLE, P0300 CODE IS UP. I REPLACED
HAVE A 2003 CADILLAC DEVILLE, P0300 CODE IS UP. I REPLACED PLUGS AND WIRES FRONT AND BACK AND IT IS STILL MISFIREING, I HAVE A SNAP-ON SCANNER HOOKED UP TO IT TO SEE WHAT CYLINDERS ARE MISFIRING, 2 3 … read more
Dave Nova
Dave Nova
Cadillac Technician
Associate Degree
1,522 satisfied customers
1999 cadillac: moter..car ran fine..no injector pulse ingnition
i am working on a 1999 cadillac devil (no pun) i replaced the moter and the car ran fine then all of a sudden i have a no start no code condition and no injector pulse ingnition seems fin e and will r… read more
ase_master327
ase_master327
Owner & Student
High School or GED
3,214 satisfied customers
2001 Cadillac Deville: give it gas constantly after it cranks up
Why do my 2001 Cadillac Deville cut off if i dont give it gas constantly after it cranks up?… read more
Derek B
Derek B
Vocational, Technical or Trade Scho
25 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