Car

Ask a mechanic online and get answers to your car questions

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

I have a question about ignition wire resistance for my 1985…

second opinion] I have a...
second opinion] I have a question about ignition wire resistance for my 1985 VW Scirocco. My Bentley manual states that spark plug wire resistance must be between 4800 and 7200 ohms. Both existing and new wires measure at 5100 ohms. So far, so good. The coil wire resistance must be between 1600 and 2400 ohms. Existing coil wire measures 7200 ohms. This is why I bought new wires. But the new coil wire also has a measured resistance of 7200 ohms. What’s going on here? Is the book wrong, or is this new wire really bad?
Show More
Show Less
Ask Your Own Car Question
Answered in 16 minutes by:
10/22/2017
Chris
Chris, Auto Service Technician
Category: Car
Satisfied Customers: 14,858
Experience: 43 years of automotive repair, Smog license
Verified
Hello, my name is ***** ***** I will be assisting you today
Ask Your Own Car Question
The book is wrong. Radio suppression ignition wires will generally have around 7000 to 10000 ohms of residtance per foot. May have been a typo in the book.Chris
Ask Your Own Car Question
I hope that this information is helpful and if so, would you kindly take a moment and rate my service or accept my answer using the just answer star rating system? I would really appreciate it. I will still be able to help you out even after you rate me.
Thank you!
Chris
Ask Your Own Car Question
Hello, just checking back to see if you received my answer from earlier today. Please let me know if you need further assistance.Chris
Chris
Chris, Auto Service Technician
Category: Car
Satisfied Customers: 14,858
Experience: 43 years of automotive repair, Smog license
Verified
Chris and 87 other Car Specialists are ready to help you
Ask your own question now
Customer reply replied 8 months ago
Thanks! Yes, your answer has helped a lot.
Martin
Martin, auto electrical
Category: Car
Satisfied Customers: 806
Experience: South African Trade Diploma in Auto Electrical
Verified

Hello, Welcome to Just Answer.

Yes the resistance of the wire help to prevent electromagnetic noise on the radio. When the wire is faulty you will find it has a very much higher resistance and or a open curciute.

Greetings,

Martin.

Ask Your Own Car Question
Thank you for accepting my answer!Chris
Ask Your Own Car Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with an auto mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Chris Your Own Question
Chris
Chris
Chris, Auto Service Technician
Category: Car
Satisfied Customers: 14,858
14,858 Satisfied Customers
Experience: 43 years of automotive repair, Smog license

Chris 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:

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

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time!

Paul MCorpus Christi, TX

< Previous | Next >

Meet the Experts:

Chris (aka-Moose)

Chris (aka-Moose)

Technician

1,330 satisfied customers

16 years of experience

Ted G.

Ted G.

ASE Certified Technician

1,754 satisfied customers

20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness

George H.

George H.

ASE Certified Technician

1,560 satisfied customers

ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist

GM Tech (Cam)

GM Tech (Cam)

Auto Service Tech

678 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Amedee

Amedee

Former ASE Master Tech

2,557 satisfied customers

ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector

Jerry

Jerry

Master Mechanic

2,181 satisfied customers

ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager

Richard

Richard

ASE Certified Technician

1,008 satisfied customers

12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes

< Previous | Next >

Related Car Questions
Volkswagen Beetle Turbo S: my VW 2.0t misfires and chugs along
my VW 2.0t misfires and chugs along at anything but light throttle. when no load the unit revs with some complaining until the 4k rev limiter in neutral. any idea what the misfire is? it just suddenly… read more
cloe0626
cloe0626
800 satisfied customers
2002 Mitsubishi Montero: electrical values (ohms..voltage..My engine
What are the electrical values (ohms and voltage output) of a 2002 Mitsubishi Montero 3.5L crankshaft position sensor? My engine will not run and only has spark on the #1and 4 coil. Switched the coils… read more
OnlineHelp
OnlineHelp
Bachelor's Degree
3,390 satisfied customers
Metro: geo..I notice on real damp, humid or rainy days..noticable loss
I own a 1994 Geo Metro. I notice on real damp, humid or rainy days the car has a noticable loss of power or pickup. What could be the problem? I had the plugs and wires changed about a year ago. Gus… read more
mike a mechanic
mike a mechanic
Auto Mechanic
Vocational, Technical or Trade Scho
89 satisfied customers
1988 dodge: van..motor home..60 miles of strong travel..climbing
1988 dodge van "Harvest" mini motor home. 440/727. died after 60 miles of strong travel, 3 miles after climbing a 5 mile grade. changed cap, rotor, alternator, ballast, coil, module. multimeter shows … read more
GM-Frank
GM-Frank
Lead Technician
37 years Automotive Repair Exp.
278 satisfied customers
Neon: plymouth..that was just involved in a minor front collision
I have a 1997 Plymouth Neon that was just involved in a minor front collision. Now the car won''t start. It turns over but doesn''t start. Is there a fuel cut-off on this car, and if so where is it?… read more
OnlineHelp
OnlineHelp
Bachelor's Degree
3,390 satisfied customers
1989 Mazda MPV: mi..4cyl 2wd...constantly burning out my coil.
1989 Mazda MPV 305000 mi. 4cyl 2wd. I am constantly burning out my coil. Can you give me some thing to look for? It quit on me one morning & wouldn't restart. Towed home. Tried to start after replacin… read more
CTDAN
CTDAN
heavy equipment mechanic
Vocational, Technical or Trade Scho
1978 B300: van..The 318 CI runs..runs fine..restarted..starting fluid
I have a 1978 B300 Dodge van with a frustrating problem. The 318 CI runs fine for about five to seven minutes, then suddenly shuts off and can't be restarted. 'I think it's an ignition problem, as eve… read more
Marc
Marc
fleet supervisor
Vocational, Technical or Trade Scho
1,140 satisfied customers
96 dodge neon: inside cylinders..abot 20 minutes and die..awhile
I have a 96 dodge neon that is firering good on the inside cylinders and only getting few sparks on the outside ones. my car will start up and run for abot 20 minutes and die down and then wont start … read more
Davo
Davo
Master Auto Tech/manager of auto shop
Vocational, Technical or Trade Scho
1,644 satisfied customers
1991 hyundai: coil, cap, wires,power unit, and fuel pump..ecu module
I am looking for help diagnosing a no-spark problem on a 1991 Hyundai Sonota. I have replaced the coil, cap, wires,power unit, and fuel pump. How do I test, crank position sensor, power transister, an… read more
Michael
Michael
Work Equip. Repair Foreman
Vocational, Technical or Trade Scho
554 satisfied customers
probed: hot side of the fuse socket..electrical connection..geo..cyl
I Have another question for Micheal. I probed the hot side of the fuse socket like you said, and the light was on, then I disconnected the electrical connection from the coil and the light went out, s… read more
Michael
Michael
Work Equip. Repair Foreman
Vocational, Technical or Trade Scho
554 satisfied customers
99 plymouth breeze..intermittent spark-possibilities..2.4L
99 plymouth breeze turns over, will not start, have replaced fuel pump. has intermittent spark-possibilities? Optional Information: 1999 breeze 2.4L Already Tried: replaced fuel pump… read more
32roadster
32roadster
Service Technician
Vocational, Technical or Trade Scho
30 satisfied customers
1990 mitsubishi montero: I replaced the coil on it and still nothing.
I have a 1990 mitsubishi montero. It has no spark. I replaced the coil on it and still nothing. When I pull the coil wire out and set it on something metal I only get a spark when I first turn the key… read more
Firsthogman
Firsthogman
Meter Specialist I
Associate Degree
296 satisfied customers
1990 TOYOTA: TIMING CHAIN..ROTOR turning ok..NO GROUND PULSE AT
1990 TOYOTA 2.4 TRUCK NO SPARK NO START NEW COIL GOOD TIMING CHAIN HAS PHOTO SENSOR IN DIS. Optional Information: 1990 Toyota TRUCK 2.4 Already Tried: CHECKED FOR SPARK NONE CHECKED FOR ROTOR TURNING … read more
Michael
Michael
Work Equip. Repair Foreman
Vocational, Technical or Trade Scho
554 satisfied customers
RECENTLY MY 1985 LINCOLN TOWN CAR WOULDNT START,SO I
RECENTLY MY 1985 LINCOLN TOWN CAR WOULDNT START,SO I REPLACED THE IGNITION MODULE AND IT WAS FINE FOR ABOUT 3 DAYS. THEN IT WOULDNT START AGAIN(NO SPARK) TODAY I REPLACED THE STARTER SELIONOID,BATTERY… read more
HDGENE
HDGENE
Master Technician/Lead Technician
Associate Degree
2,835 satisfied customers
1994 escort: cylinder..tried a new coil and new module..I check next?
My 1994 escort 1.9 engine has no spark output for number 2 cylinder. I have tried a new coil and new module with no success. What do I check next?… read more
HDGENE
HDGENE
Master Technician/Lead Technician
Associate Degree
2,835 satisfied customers
1987 Chevy sprint: liter..carb..The ecm and the coil are ok
Hello I have a 1987 Chevy sprint 1 liter 3cyl. 2brl carb. The ecm and the coil are ok. But it does not get fire....what am i missing?… read more
Hammer Time
Hammer Time
Mastertech
Vocational, Technical or Trade Scho
2,650 satisfied customers
Mighty max: I put a new roter,cap,coil,new ignition modual/distributer
I have a 1990 mits. mighty max that will give no spark.I put a new roter,cap,coil,new ignition modual/distributer & still no spark. Can you shed some light on this for me?… read more
Tech501
Tech501
Lead Technician
390 satisfied customers
86 Mercury: 5.0...her and wouldnt restart for any where
A female friend has a 86 Mercury Grand Marque, 5.0. After she owned it for 6 months it started to quit on her and wouldn't restart for any where from 30 to 120 minutes. She contacted the seller and he… read more
detroitdinosaur
detroitdinosaur
Fleet Maintenance Supervisor
Vocational, Technical or Trade Scho
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